Decision Review
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Decision Reason Preview
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Multiple Choice
True or false: In any simple graph with $n$ vertices, at least $\dfrac{n}{2}$ edges are needed to guarantee that no vert
Options:
  • True
  • False
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Question
The perimeter of an equilateral triangle is $123$ cm. What is the length of one side?
Answer:
  • 41 cm
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Multiple Choice
True or false: $0.005$ kL + $50000$ mL is greater than $0.1$ m$^3$.
Options:
  • True
  • False
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Multiple Choice
The system of symbols used to represent sets is called set $\fbox{\phantom{4000000000}}$
Options:
  • notation
  • vocabulary
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Convert $3.75$ litres to millilitres.
Answer:
  • 3750 mL
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Which of the following is a unit of length in the metric system?
Options:
  • Centimetres
  • Miles
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Multiple Choice
Determine the general term formula for the given arithmetic sequence. $6,2,-2,-6,\dots$
Options:
  • $t_n=6-(n+1)4$
  • $t_n=6-(n+1)(-4)$
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Multiple Choice
Which asset is likely to depreciate the fastest?
Options:
  • A new car
  • Land near a shopping centre
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Question
Find the volume of the composite solid shown below. Image description: A cylinder with radius $5$ cm and height $18$ c
Answer:
  • 1990 cm$^3$
Localize AU/British spelling (e.g. colour→color, centre→center)
Subtopic: Measures of Centre
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How can subgraphs help analyse specific components of a larger graph?
Answer:
  • Subgraphs help analyse specific components of a larger graph by focusing on individual sections or relationships.
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Multiple Choice
An object moves in a straight line and its displacement function is given by $s(t)=t^2-2t-5$ metres where time $t$ is in
Options:
  • None of the above
  • $a(t)=4t^2-2t$ m/s$^2$
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Multiple Choice
Which recurrence relation represents a geometric sequence with first term $5$ and common ratio $3$?
Options:
  • $u_0 = 5$, $u_{n +1}= \Large \frac{u_{n}}{3}$
  • $u_0 = 5$, $u_{n +1}= u_{n} -3$
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Question
How many cubic millimetres are there in $10$ cubic centimetres ?
Answer:
  • 10000 cubic millimetres
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
What makes $r^2$ represent the squared radius in the circle $(x-h)^2+(y-k)^2=r^2$?
Answer:
  • $r^2$ represents the squared radius in the circle equation $(x-h)^2 + (y-k)^2 = r^2$ because it shows the distance squar
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Question
Show why the volume of a $2$ cm $\times$ $2$ cm $\times$ $8$ cm prism is the same as the volume of two $2$ cm $\times$ $
Answer:
  • The volume of the $2$ cm $\times$ $2$ cm $\times$ $8$ cm prism is $2 \times 2 \times 8 = 32$ cm$^3$. Each smaller prism
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
To find the next shape in a growing pattern, look for the $\fbox{\phantom{4000000000}}$ in how the shapes grow.
Options:
  • corner
  • shape
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Question
How do you know $y=3(2^x)+2$ has asymptote $y=2$?
Hint: Constant term $2$ is asymptote
Answer:
  • As $x→-∞$, $2^x→0$, so $y=3(0)+2=2$. The horizontal asymptote is $y=2$ because it's the constant term added to exponenti
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Question
How do you know a shape with base area $42$ cm$^2$ and height $4$ cm cannot have a volume of $200$ cm$^3$?
Answer:
  • Volume is base area $\times$ height. Here $42 \times 4 = 168$ cm$^3$. Since the correct volume is $168$, it cannot be $2
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Question
A spinner has $8$ equal sections numbered $1$ to $8$. A card is drawn from a deck containing $10$ cards numbered $1$ to
Answer:
  • \frac{1}{4}
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Question
Why can an equation containing a term with an even exponent have two real solutions?
Answer:
  • Because raising a number to an even exponent makes both positive and negative values give the same result.
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Question
What is the next term in the sequence? $10.5, 25.5, 54.5, 97.5, \dots$
Answer:
  • 154.5
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Multiple Choice
The $\fbox{\phantom{4000000000}}$ of rotation refers to how many degrees an object is turned.
Options:
  • angle
  • magnitude
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Question
How many cubic metres are there in $7$ kL?
Answer:
  • 7 m$^3$
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Question
Let $X$ be a binomial random variable with variables $n=5000$ and $p=0.67$. Using the normal approximation of the binom
Answer:
  • 0.4641
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Question
Express $\log_{5}{3}+\log_{5}{2}+\log_{5}{6}+\log_5{1}$ as a single logarithm.
Answer:
  • \log_{5}(36)
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Question
Why can’t a shape with $5$ corners be a square?
Answer:
  • A square has exactly $4$ corners. A shape with $5$ corners is not a square.
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Question
What is the next term in the given sequence below? $-10, -6, -2, \cdots$
Answer:
  • 2
Localize School terminology (e.g. Year 7, maths, term dates)
Question
A student picked up $12$ pieces of rubbish on Monday and $25$ pieces on Tuesday. How many pieces of rubbish did they pic
Answer:
  • 37
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Question
What is $43.8-13.5$ ?
Answer:
  • 30.3
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Multiple Choice
Fill in the blank. The shortest distance along a meridian between two points $A$ and $B$ on the Earth's surface is given
Options:
  • Distance $AB$ by joining $A$ and $B$ using a straight line
  • Arc length $AB$ of the great circle that passes through $A$ & $B$
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Multiple Choice
True or false: $0.6$ is smaller than $6\%$
Options:
  • True
  • False
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Question
Why do we use powers in the rule $T_n = a \times r^{n-1}$ for a geometric sequence?
Answer:
  • Each term is found by multiplying by the common ratio repeatedly, and the power shows how many times the ratio is used.
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Skill: Rounding decimals by decimal places
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Question
Show why $\{1, 2\} \cup \{2, 3\} = \{1, 2, 3\}$.
Hint: Consider union properties
Answer:
  • Union $\cup$ combines sets without duplicates. $2$ appears once, all elements included.
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
True or false: The displacement of air particles in a sound wave is given by $y = 10\cos\left(\frac{\pi}{5}t\right)$, w
Options:
  • False
  • True
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Multiple Choice
Which option has the greater total capacity? A: $10$ test tubes of $75$ mL and $1$ large measuring cup of $2.5$ L B: $4$
Options:
  • B
  • A
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Question
Explain why $0.7 \times 0.5$ equals $0.35$.
Answer:
  • Multiply $7 \times 5 = 35$. Each factor has $1$ decimal place, so result needs $2$ decimal places. Therefore, $0.7 \time
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Question
In any right-angled triangle, why is the sine of one acute angle equal to the cosine of the other?
Answer:
  • The side that is 'opposite' one acute angle is, by definition, the side that is 'adjacent' to the other complementary an
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Question
If $2x^2 + 3x + k$ and $2x^2 + ax + 5$ are equal, why can you find $a$ and $k$ by comparing their coefficients instead o
Answer:
  • Equality of polynomials depends on their structure, not on specific values of $x$. Matching like terms directly shows th
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Question
A $10$ cm by $18$ cm photo is placed in a frame that is $4$ cm wide on all sides. What is the outer perimeter of the fr
Hint: It may help to draw a diagram of the photo and frame.
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Question
Show why doubling the number of times interest is compounded in a year increases the amount.
Answer:
  • On $\$100$ at $10\%$ for $1$ year, compounding once gives $\$110$, but compounding twice at $5\%$ each time gives $\$110
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Question
Explain why the graph of a geometric sequence $a_n = a_1 r^{n-1}$ curves upwards if $a_1 > 0$ and the common ratio $r >
Hint: Consider ratio effects
Answer:
  • Ratio $>1$ means each term multiplies by number greater than $1$, creating exponential growth curve upward.
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Question
Express $15$ g in kilograms.
Answer:
  • 0.015 kg
Localize School terminology (e.g. Year 7, maths, term dates)
Multiple Choice
Write $ 529630$ in words.
Options:
  • Five twenty-nine thousand, six hundred thirty
  • Five hundred and twenty-nine thousand, six three zero
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Question
A die is rolled, and a coin is flipped. The outcome of each is recorded. How many elements are in the sample space?
Answer:
  • 12
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Multiple Choice
Area is measured in $\fbox{\phantom{4000000000}}$ units, such as square centimetres or square metres.
Options:
  • linear
  • squared
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Multiple Choice
The sample variance ($s^2$) for a set of measurements is calculated to be $2.25$ m$^2$. What is the sample standard devi
Options:
  • $2.25$ m
  • $1.125$ m
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Question
How would you represent $2 \frac{2}{5}$ using rectangles?
Answer:
  • Draw three rectangles. Shade first two completely ($2$). Divide third into five equal parts and shade two parts ($\frac{
Localize Units in math expressions — needs careful conversion
Multiple Choice
What are the correct dimensions of a rectangle where the numerical value of its perimeter equals twice its area?
Options:
  • $6$ cm $\times$ $3$ cm
  • $5$ cm $\times$ $4$ cm
Localize Units in math expressions — needs careful conversion
Question
A bottle contains $94$ mL of juice. If $7$ mL is poured into a glass, how much juice is left in the bottle?
Answer:
  • 87 mL
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Multiple Choice
Fill in the blank: If the $n^\text{th}$ term of a geometric sequence is $6(-2)^{n-1}$, the common ratio is $[?]$.
Options:
  • $6$
  • $-1$
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Multiple Choice
What is the missing term in the given equation? $x^3-2y^3+[?]=x(x^2+y)-2y^3$
Options:
  • $xy$
  • $y$
Localize Units in math expressions — needs careful conversion
Question
The coordinates of point $A$ and point $B$ are $(15^\circ N,50^\circ E)$ and $(15^\circ N, 90^\circ E)$ respectively. Fi
Hint: Take the Earth's radius to be $6371$ km
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Question
Explain why a triangle with sides $5$ cm, $7$ cm, and an included angle $60^\circ$ has an area of approximately $15.2$ c
Answer:
  • Using area formula Area $=\frac{1}{2}ab\sin C$: Area $=\frac{1}{2}(5)(7)\sin(60^\circ) = \frac{35}{2} \times \frac{\sqrt
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Question
Why is the year split into four seasons?
Answer:
  • The year changes in weather. Each change is called a season. That is why the year has four seasons.
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Question
Find the $11^{th}$ term of the geometric sequence $2,2\sqrt{2},4,\dots$.
Answer:
  • 64
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Question
In a triangle, two adjacent sides are $15$ cm and $18$ cm long with an obtuse angle, $x$, between them. If the area is $
Answer:
  • 121 $^\circ$
Localize Units in math expressions — needs careful conversion
Question
The minute hand of a watch is $15$ cm long. How far does its tip move in $40$ minutes?
Answer:
  • 62.8 cm
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Question
What is the next term in the given sequence below? $309, 301, 293, \dots$
Answer:
  • 285
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Question
What is $5028+1230-1675$ ?
Answer:
  • 4583
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Question
How do you know that halving the diameter halves the circumference? Use an example to explain.
Answer:
  • For example, if the diameter is $10$ cm, the circumference is $10\pi$ cm. Halving the diameter to $5$ cm gives circumfer
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Multiple Choice
Identify the base in $k^m$.
Options:
  • $m$
  • $km$
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Skill: Identifying changes to the critical path due to crashing
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Question
What is the missing term in the given sequence? $1, 0.75, [?], 0.25, 0$
Answer:
  • 0.50
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Multiple Choice
What is the seventh month of the year?
Options:
  • September
  • July
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Question
Explain why increasing the rate increases the total simple interest using an example.
Answer:
  • On $\$1000$ for $1$ year, $5\%$ interest gives $\$50$, but $10\%$ gives $\$100$. A higher rate makes the total interest
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Question
Convert $2.6$ L into mL.
Answer:
  • 2600 mL
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Multiple Choice
Which of the following correctly splits the middle term in $x^2 + 5x +6$ so it can be factorised by grouping?
Options:
  • $x^2+4x+x+6$
  • $x^2+7x-2x+6$
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Question
The perimeter of a regular octagon is $904$ cm. What is the length of its side?
Answer:
  • 113 cm
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why do you separate numerical from categorical data?
Answer:
  • Numerical data are numbers we can measure or count. Categorical data are types or groups. Keeping them separate helps us
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Multiple Choice
True or false: A small circle can pass through the centre of the Earth.
Options:
  • False
  • True
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Question
Find the density of an ice cube of mass $2$ g and volume $0.27$ cm$^3$.
Answer:
  • 7.4 g/cm$^3$
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Multiple Choice
Determine the formula for the arithmetic sequence $t_n$ whose fourth term is $1$ and whose fifteenth term is $-32$.
Options:
  • $t_n=-10-3n$
  • $t_n=10+(n+1)(-3)$
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Question
What is the next term in the sequence? $1,10,100,1000,\dots$
Answer:
  • 10000
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Question
Find the volume of a piece of metal with a mass of $100$ g and density of $1.80$ g/cm$^3.$
Answer:
  • 55.56 cm$^3$
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Question
The $8$th term in a pattern is $9.2136$. Each term increases by $0.8012$. What is the first term?
Answer:
  • 3.6052
Localize Units in math expressions — needs careful conversion
Question
Find the perimeter of a rectangular block of land that is $2$ km long and $0.6$ km wide.
Answer:
  • 5.2 km
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Question
Find the $18$th term in the arithmetic sequence $-2,-7,-12,-17,. . . $
Answer:
  • -87
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Question
Fill in the blank: $4.5$ m$^2 = [?] $ cm$^2$
Answer:
  • 45000
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Question
Determine the next term in the sequence $ \frac{2}{3}, \frac{5}{3}, \frac{8}{3}, \frac{11}{3}, [?]$.
Answer:
  • \frac{14}{3}
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Question
Why do we divide annual interest rate by number of periods?
Hint: Divide the annual rate by the number of periods in a year.
Answer:
  • We divide the annual interest rate by the number of periods to calculate the rate for each compounding period.
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Question
What is the next term in the sequence ? $-3, 9, -27, \dots$
Answer:
  • 81
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Question
What is the missing term in the given sequence? $-3.75$, $-3.45$, $[?]$, $-2.85$
Answer:
  • -3.15
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Question
Fill in the blank: $15600$ kilograms $+[?]$ megagrams $=17900$ kilograms
Answer:
  • 2.3
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Question
Consider the sequence where $n^2$ is the rule and $n$ is the position of the term. If the $4$th term is $16$, which ter
Answer:
  • 9 th term
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Multiple Choice
Which of the following is not true with respect to the interest rate of a fixed interest rate personal loan?
Options:
  • All of the above
  • Irregular payments can be made
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Question
How do you check if a number can be shared equally into groups of $5$ and groups of $10$? Why does this work?
Answer:
  • If a number ends in $0$, it can be shared equally into groups of $5$ and into groups of $10$. This works because ending
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Find the coordinates of the centre of the rectangular hyperbola $y = \frac{-3}{2x+1} + 2$. What is the sum of these coor
Answer:
  • 1.5
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Question
Find the area of a circle whose circumference is $44$ cm.
Answer:
  • 154 cm$^2$
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Question
What is $42 \div 6$ ?
Answer:
  • 7
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Question
After $500$ rotations, a wheel has travelled $1.06$ km. Find the diameter of the wheel in metres.
Answer:
  • 0.67 m
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Question
Bernadette's invests $\$10000$ for $n$ years on a $6.8\%$ interest rate compounded annually. The recurrence relation for
Answer:
  • $\$$ 12181.86
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Question
What is the $7^\text{th}$ term in Lucas sequence?
Answer:
  • 29
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Question
Find the total surface area of a hemisphere of radius $8$ cm.
Hint: Total surface area $=$ Curved surface area $+$ Base area
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A swimming pool has a capacity of $120$ kilolitres. How many litres is this?
Answer:
  • 120000 L
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Skill: Identifying real life events that can't occur together
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
The thickness of a piece of paper is approximately $1$ mm. If a book contains $500$ pages, what is the most appropriate
Options:
  • Metres
  • Centimetres
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Question
Find the area of a parallelogram with a height of $3$ cm and a base twice the length of its height.
Answer:
  • 18 cm$^2$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why might different points reveal important polynomial features?
Hint: Test multiple points to observe patterns.
Answer:
  • Different points reveal important polynomial features by showing changes in value and behaviour at specific inputs.
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Question
A swimmer moves at a speed of $2.5$ metres per second. Convert this speed to kilometres per hour.
Answer:
  • 9 km/h
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Question
How can choosing the right unit of volume make calculations easier?
Answer:
  • The right unit keeps the numbers simple. For example, using litres instead of mL for a big container avoids very large n
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Question
What is $13 \times 10$?
Answer:
  • 130
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Question
Divide the numbers: $235689\div19$
Answer:
  • 12404.684
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Question
A tunnel runs for $46$ km on a bearing of $330^\circ \text{T}$. How far north is the end of the tunnel from its startin
Hint: Use trigonometry to determine the distance travelled.
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How does understanding the unit circle relate to predicting sine curve behaviour?
Hint: Use the y-coordinate of points on the unit circle.
Answer:
  • The unit circle defines sine values for angles, helping us predict sine curve patterns.
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Question
Write the second smallest of the following fractions. $\frac{11}{20}, \frac{9}{16}, \frac{5}{8}, \frac{7}{12}, \frac{13}
Answer:
  • \frac{11}{20}
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Multiple Choice
There are $60$ minutes in one degree. An angle measures $78.833^\circ$. Convert this to degrees and minutes, rounding th
Options:
  • $78^\circ\ 50'$
  • $8^\circ\ 50'$
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Question
A sequence increases by $7$ each time. If the $10$th term is $200$, what is the value of the $2$nd term?
Answer:
  • 144
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Question
A water tank fills at a rate of $120$ litres per minute. What is this rate in litres per hour?
Answer:
  • 7200 L per hour
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Question
Convert $1$ cubic metre to litres.
Answer:
  • 1000 L
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Question
The number of leaves, $N$, on a tree after $t$ years is given by $N(t) = 20000t + t^5 - 21t^2$. Given that $N'(t) = 200
Answer:
  • 69580 leaves/year
Localize Unit references in text (e.g. kilometres→miles)
Multiple Choice
Which of the following is an example of categorical data?
Options:
  • Temperature in degrees Celsius
  • Brand of car
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Multiple Choice
In an equilateral triangle $ABC$ with side length $10$ cm, the angle bisector from $A$ meets $BC$ at point $D$. What is
Options:
  • $2.5$ cm
  • $5$ cm
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Skill: Calculating the times tables up to $15$
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Multiple Choice
True of false: A parallelogram with a perpendicular height of $2$ cm and a base length $5$ cm has an area of $10$ cm$^2$
Options:
  • False
  • True
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Multiple Choice
Which of these can't be represented by a binomial random variable?
Options:
  • None of the above
  • Selecting a red ball in $20$ sttempts from a bag containing red and white balls, replacing the chosen ball each time
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Multiple Choice
Which operation would turn $6m$ into a like term with $-2mn$?
Options:
  • Subtract $n$
  • Multiply by $n$
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Question
The cost of a $2$ litre can of paint is $\$6$. What will the cost of $24$ litres of paint be?
Answer:
  • $\$$ 72
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Question
Why must we consider time period in compound curves?
Hint: Think about how time influences the overall growth in exponential situations.
Answer:
  • We must consider the time period in compound curves because longer periods amplify the effects of compounding.
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Multiple Choice
A positive gradient indicates an $\fbox{\phantom{4000000000}}$ line, while a negative gradient indicates a downward sl
Options:
  • horizontal
  • vertical
Localize Units in math expressions — needs careful conversion
Question
A wizard wears a conical hat with a circular base of radius $3$ cm and a height of $4$ cm. What is the curved surface a
Answer:
  • 47.12 cm$^2$
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Question
A boat sails $12$ km on a bearing of $126^\circ \text{T}$, then $68$ km on a bearing of $216^\circ \text{T}$. Find the
Answer:
  • 206 $^\circ T$
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Subtopic: Naming Numbers
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Question
What makes tree diagrams useful for multi-step probability problems?
Hint: Each branch represents a possible path for events.
Answer:
  • Tree diagrams are useful for multi-step probability problems because they organise possible outcomes clearly.
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Multiple Choice
What is the coefficient of the $x^2$ term in the expansion of the polynomial $P(x) = (4x^2 - 3)(x+2)$?
Options:
  • $5$
  • $4$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Which of the following statements best describes the behaviour of the graph of $y = \cos(x)$ over the interval $0^\circ
Options:
  • The graph has a maximum value at $x = 180^\circ$
  • The minimum value of the graph is $-1$ and occurs at $x = 0^\circ$
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Multiple Choice
Fill in the blank: Co-interior angles are always $[?]$.
Options:
  • Congruent
  • Complementary
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Question
A rectangular garden has a length of $4\sqrt{3}$ metres. The area of the garden is $24\sqrt{3}$ square metres. Find the
Answer:
  • 6 metres
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Question
A right circular cylinder has height equal to its base radius. Point $V$ lies halfway up the side, directly above a poin
Answer:
  • 26.6 $^\circ$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why does a frequency table help organise data into categories?
Hint: Think about how categories make data easier to analyse.
Answer:
  • A frequency table helps organise data into categories by grouping values and tallying their occurrences.
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Question
An additional monthly payment of $\$1000$ is being made on a sum of $\$500$, initially invested at $5.5\%$ per annum, co
Answer:
  • $\$$ 1502.29
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Question
Convert $0.075$ cm$^3$ to mm$^3$.
Answer:
  • 75 mm$^3$
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Multiple Choice
Consider the function $h(x) = \sqrt{4-x^2}$ with domain $[-2, 2]$. Is this function one-to-one or many-to-one?
Options:
  • Many-to-one
  • One-to-one
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Question
Explain why $A=P(1+\frac{R}{n})^{nt}$ calculates the total amount
Hint: $nt$ total compounding periods
Answer:
  • Formula compounds $n$ times per year for $t$ years using adjusted rate $\frac{R}{n}$ per period. Power $nt$ represents t
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Question
The highest score on a maths test is $95$ and the lowest is $60$. What is the range?
Answer:
  • 35
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Question
A student says the only solution to $\tan^2 x = 1$ between $0^\circ$ and $360^\circ$ is $x = 45^\circ$. Explain why this
Answer:
  • The student only considered the positive case. Since $\tan^2x = 1 \Rightarrow \tan x = \pm1$. Tangent is $1$ at $45^\cir
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Fill in the blank: The highest or lowest point on the graph of a parabola is called the $[?]$.
Options:
  • Centre
  • Focus
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Question
Find the next term in the given sequence. $ 0.02, 0.04, 0.06,\dots$
Answer:
  • 0.08
Skip No changes needed
Skill: Understanding inverse matrices
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A random survey of $500$ people was conducted, and their responses recorded, with $369$ people agreeing that maths was t
Answer:
  • 0.0323
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Question
How many mL are there in $0.1$ L ?
Answer:
  • 100 mL
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Multiple Choice
In Melbourne, $120$ schools are randomly surveyed to study the effects of remote learning. Which group is the population
Options:
  • Schools across Victoria
  • Students in the $120$ schools
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Multiple Choice
A graph with $4$ vertices, $6$ edges and $5$ faces is a connected graph.
Options:
  • False
  • True
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Question
In a number pattern, each term is given by the rule: $\text{term} = 6 - 2n$, where $n$ is the position in the pattern. W
Answer:
  • 5
Skip Metric units — keep as-is for pedagogy
Multiple Choice
True or false: Shape A has side lengths $4$ cm and $8$ cm. Shape B has side lengths $5$ cm and $8$ cm. Shape B could be
Options:
  • True
  • False
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Which of the following pairs of variables is not suitable for a scatterplot?
Options:
  • Circumference and diameter
  • Shoe size and foot size
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Question
The lines $y = (k - 2)x + (3k + 1)$ and $y = (k + 1)x + (k - 5)$ intersect at $x = 1$. Find the value of $k$.
Answer:
  • -1.5
Skip No changes needed
Multiple Choice
Find the general term of the arithmetic sequence. $ \frac{1}{2}, 1, \frac{3}{2}, 2, \dots $
Options:
  • $ \frac{1}{2}n - \frac{1}{2} $
  • $ n - \frac{1}{2} $
Localize Units in math expressions — needs careful conversion
Question
What is the distance along $26^\circ$N between ($26^\circ$N, $150^\circ$W) and ($26^\circ$N, $112^\circ$W), rounded to t
Hint: Take the Earth's radius to be $6371$ km
Localize Units in math expressions — needs careful conversion
Question
A statue casts a $650.40$ cm shadow. A $102.36$ cm garden fence nearby casts a $68.24$ cm shadow. How tall is the statue
Answer:
  • 975.6 cm
Localize Units in math expressions — needs careful conversion
Multiple Choice
Fill in the blank: $10$ nanometres $=[?]$ metres
Options:
  • $\frac{1}{10000}$
  • $10000$
Localize Units in math expressions — needs careful conversion
Multiple Choice
Drivers must travel slower than $40$ km/h in a certain zone. Which inequality represents this if $v$ is the car's speed
Options:
  • $v\leq40$
  • $v\geq40$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why is the radius one unit for a unit circle?
Answer:
  • The unit circle is defined that way, so every point on it is $1$ unit from the centre.
Skip Metric units — keep as-is for pedagogy
Question
The density $D$ of a metal block varies inversely with its volume $V$ when mass is fixed. When the volume is $4.8$ cm$^
Answer:
  • 11.25 g/cm$^3$
Localize Units in math expressions — needs careful conversion
Question
What makes height numerical data?
Answer:
  • Height is measured with numbers, like $120$ cm or $150$ cm. You can compare, add, or subtract these numbers, so height i
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
The SI base unit for length is the metre (m). Which of these is a derived SI unit for area?
Options:
  • Cubic metre (m$^3$)
  • Hectare (ha)
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Question
A box has a volume of $2$ m$^3$. How many smaller boxes with a volume of $4000$ cm$^3$ can fit inside it?
Answer:
  • 500
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Which of the following is the general equation of a semicircle with a centre at the origin and radius $r$ units?
Options:
  • $y=\pm{r^{2}-x^{2}}$
  • $y=\pm\sqrt{r^{2}-x^{2}}$
Skip No changes needed
Question
Explain why a parallelogram with base $3$ cm and perpendicular height $6$ cm cannot have an area of $9$ cm$^2$.
Answer:
  • The area must be base $\times$ height: $3$ cm $\times$ $6$ cm $= 18$ cm$^2$. It cannot be $9$ cm$^2$.
Skip No changes needed
Multiple Choice
At which points do the equations $y=-2x^2+1$ and $y=x$ intersect?
Options:
  • $(-1,-1)$ and $(\frac{1}{2},\frac{1}{2})$
  • $(-1,1)$ and $(\frac{1}{2},\frac{1}{2})$
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Multiple Choice
The value of an investment triples after $x$ years at an interest rate of $r\%$ per year, compounded annually. The same
Options:
  • $y > x$
  • $y = x$
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Multiple Choice
Andrew wants to take a loan of $\$20000$ from a bank. He has been provided two loan options in that bank: Loan A $:4\%$
Options:
  • Loan B
  • Loan A
Review AI was not confident enough to classify
Question
Find the circumference of a circle with a radius of $4.5$ cm.
Answer:
  • 28.27 cm
Skip No changes needed
Question
How does finding $100\%$ relate to understanding percentage change?
Answer:
  • $100\%$ is the whole amount. A percentage change compares the increase or decrease to this whole.
Skip No changes needed
Question
Explain why the $3$rd term in a sequence with recurrence relation $V_0 = 15$, $V_{n+1} = V_n - 4$ is positive.
Hint: Start at $15$, subtract $4$ twice
Answer:
  • Starting with $V_0=15$: $V_1 = 15 - 4 = 11$. $V_2 = 11 - 4 = 7$. Since $V_2=7$ is positive, the term is positive.
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Question
An amount of money was invested at an $11\%$ simple interest rate per year. It grew to $\$5988$ in $2$ years and $3$ mon
Answer:
  • $\$$ 4800
Skip No changes needed
Question
Show why doubling the diameter doubles the circumference of a circle. Use an example to explain.
Answer:
  • For example, if the diameter is $6$ cm, the circumference is $6\pi$ cm. Doubling the diameter to $12$ cm gives $12\pi$ c
Skip Metric units — keep as-is for pedagogy
Question
Calculate $x + y + z$ by simplifying the ratio of the given quantities, ensuring all values are in grams: $0.64$ kg to $
Answer:
  • 181
Skip No changes needed
Question
Explain why the next term in the sequence $5, 15, 25...$ cannot be $45$
Hint: Apply arithmetic pattern
Answer:
  • Pattern adds $10$ each time: $15-5=10$, $25-15=10$. Next term must be $25+10=35$, not $45$.
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
The volume of water $(V)$ in a container increases by a factor of $2$ every hour $(t)$. If the container initially has $
Options:
  • $V=10+2^t$
  • $V=10^{2t}$
Review AI classifier and verifier disagreed
Question
It is observed that $20\%$ of cars entering a car park are red. What is the probability that the next three cars enterin
Answer:
  • 0.008
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why do grams change to kilograms the same way millilitres change to litres?
Answer:
  • Metric units follow the same pattern, so we divide or multiply by $10$, $100$, or $1000$ depending on the step, just lik
Skip No changes needed
Question
Bernadette's invests $\$10000$ for $n$ years on a $6.8\%$ interest rate compounded annually. The recurrence relation for
Answer:
  • $\$$ 13894.92
Skip No changes needed
Question
Find the missing term in the sequence. $0.010, 0.030, 0.050, [?], 0.090, 0.110$
Answer:
  • 0.070
Skip No changes needed
Question
Explain why $p_{7}=-3$ if $p_{1}=-3$ and $p_{n+1}=-p_{n}$
Hint: Track term alternation
Answer:
  • Each term is negative of previous: $p_1=-3$, $p_2=3$, $p_3=-3$, $p_4=3$, $p_5=-3$, $p_6=3$, $p_7=-3$.
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
True or false: The centre of the rectangular hyperbola $y=\frac{2}{x-1}+1$ is $(1,1)$.
Options:
  • False
  • True
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Question
In $\triangle PQR$, $PQ = 152$ cm, $QR = 207 $ cm, $\angle QRP = 36^\circ$ and $\angle PQR = 112^\circ$. Find the lengt
Answer:
  • 299 cm
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Question
By the SAS congruency rule, $\Delta ABC \cong \Delta PQR$. For $\angle A=30^\circ$, $\overline{AB}=15$ cm and $\overlin
Skip No changes needed
Multiple Choice
A period of twelve months is called a $\fbox{\phantom{4000000000}}$
Options:
  • month
  • day
Localize Unit references in text (e.g. kilometres→miles)
Multiple Choice
Which of the following is not numerical data?
Options:
  • The age of a building in years
  • The speed (km/h) of a cyclist recorded every minute
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
You are booking a theatre show ticket. Tickets are only sold in batches of $2$ tickets or more in one booking, and one
Options:
  • $f(x)=\begin{cases}30x&;x>2\\28x&;x>{5}\end{cases}$
  • $f(x)=\begin{cases}30x&;x>2\\28x&;x\geq{5}\end{cases}$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Centimetres and millimetres are $\fbox{\phantom{4000000000}}$ of length.
Options:
  • types
  • instruments
Localize Unit references in text (e.g. kilometres→miles)
Question
Why do we need different units to measure weight?
Answer:
  • Small objects are easier to measure in grams, and heavy objects are easier to measure in kilograms. Different units help
Skip No changes needed
Question
A cylinder has a radius of $r$ and height $h$. The area of its two circular ends is $2\pi r^2$. If $r=2\text{ cm}$, wha
Answer:
  • 25.13 cm$^2$
Skip No changes needed
Question
Your friend thinks that an angle the same as a right angle can also be called acute or obtuse. Why is this wrong?
Answer:
  • It is wrong because only a right angle can be the same as a square corner. Acute angles are smaller, and obtuse angles a
Skip No changes needed
Question
Why does a negative exponent result in a reciprocal?
Answer:
  • A negative exponent results in a reciprocal because $x^{-1}=\frac{1}{x}$ represents the inverse of multiplication.
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Which of the following statements defines a chord?
Options:
  • A line that outlines the circumference
  • A line joining any two points on the circle
Skip Metric units — keep as-is for pedagogy
Question
In a circle, $AB$ is the diameter with a length of $13$ cm, and $C$ is a point on the circumference. If $BC = 5$ cm, fin
Skip No changes needed
Question
Convert $5$ L into mL.
Answer:
  • 5000 mL
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
The $\fbox{\phantom{4000000000}}$ is the distance from the centre of a circle to any point on its circumference.
Options:
  • diameter
  • radius
Review AI was not confident enough to classify
Question
In triangle $ABC$, $\overline{BC} = 153$ cm, $\overline{AB} = 128$ cm, and $\angle{ABC} = 47.3^\circ$. Find $\overline{A
Answer:
  • 115 cm
Localize School terminology (e.g. Year 7, maths, term dates)
Multiple Choice
$\fbox{\phantom{4000000000}}$ form is a way of writing a linear equation that shows the gradient and $y$-intercept.
Options:
  • Intercept
  • Point-slope
Skip No changes needed
Multiple Choice
Which among these statements is true?
Options:
  • In a cycle, the movement is followed for less than $1$ year
  • In a cycle, the movement is followed for $1$ year exactly
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Express $0.006$ cubic metres in cubic centimetres.
Answer:
  • 6000 cm$^3$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How can you confirm a shape has been rotated $90^\circ$ clockwise around a specific point?
Answer:
  • Trace the shape and the centre of rotation on tracing paper. Pin it at the centre and turn it $90^\circ$ clockwise. If i
Localize Units in math expressions — needs careful conversion
Question
In a circle with diameter $AB = 10$ cm, point $C$ lies on the circle, forming $\triangle ACB$. If $BC = 6$ cm, what is
Localize School terminology (e.g. Year 7, maths, term dates)
Question
If the inflation rate is $2\%$ per year, calculate the value of $\$2000$ indexed for inflation over $2$ years.
Answer:
  • $\$$ 2080.80
Skip No changes needed
Multiple Choice
Fill in the blank. The $12^\text{th}$ term of the arithmetic sequence whose first term is $1$ and the common difference
Options:
  • $11m-1$
  • $1+11m$
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Multiple Choice
Fill in the blank: The total surface area of a closed cylinder with radius $r$ cm and height $h$ cm is given by $[?]$.
Options:
  • $(\pi rh + 2\pi r^2 )$ cm$^2$
  • $2\pi r(r+h)$ cm$^2$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why do we multiply by $1000$ when changing cubic metres into litres?
Answer:
  • We multiply by $1000$ because $1$ cubic metre holds $1000$ litres.
Review AI classifier and verifier disagreed
Question
An equilateral triangle has a perimeter of $36$ cm. If the perpendicular height of the triangle is $10.4$ cm, what is i
Answer:
  • 62.4 cm$^2$
Localize Unit references in text (e.g. kilometres→miles)
Question
How many centimetres are in $2$ metres?
Answer:
  • 200 cm
Skip No changes needed
Multiple Choice
Fill in the blank: $5a+6ab-b$ is an example of $[?]$.
Options:
  • A variable
  • An expression
Skip No changes needed
Question
Show why doubling the time doubles the simple interest earned.
Answer:
  • With $\$1000$ at $5\%$, $1$ year gives $\$50$ interest. $2$ years gives $\$100$. The time doubled, and so did the intere
Skip Metric units — keep as-is for pedagogy
Question
When should you measure something in mm and when in cm?
Answer:
  • Use mm for very small things and cm for bigger things, so the numbers are easy to read.
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A circular pizza has a diameter of $30$ cm. There is a circular hole at the centre of the pizza with a diameter of $4$ c
Answer:
  • 694.29 cm$^2$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Tim says 'miles' is not a metric unit used to measure length. How do you know he is correct?
Hint: Mile is imperial distance unit
Answer:
  • He's right. Miles are part of the imperial system. The metric system uses units like metres or kilometres for length.
Skip No changes needed
Multiple Choice
Which of the following is equal to $67$ L ?
Options:
  • $0.067$ m$^3$
  • $670$ ml
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Multiple Choice
Which number is the same as $\frac{1}{10}$?
Options:
  • $0.1\%$
  • $1\%$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
At a car service centre, $58\%$ of vehicles are petrol and $42\%$ are diesel. $12\%$ of petrol vehicles and $23\%$ of d
Answer:
  • 0.58
Skip No changes needed
Question
David found the 13th term ($a_{13}$) for the arithmetic sequence $21, 26, 31...$ to be $86$. Show that he is incorrect.
Hint: Check arithmetic pattern
Answer:
  • The sequence has $a_1=21$ and $d=5$. Using $a_n = a_1 + (n-1)d$, $a_{13} = 21 + (13-1) \times 5 = 21 + 12 \times 5 = 21
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Question
What is the period of $2\tan{6x}$ ?
Answer:
  • 6
Skip No changes needed
Multiple Choice
A number is divisible by $2$. Which of the following must also be divisible by $2$?
Options:
  • $2$ divided by the number
  • The number minus $1$
Localize Answers depend on AU units — must update together
Multiple Choice
Which units are most appropriate for measuring a small amount of cooking oil in a recipe?
Options:
  • Millilitres or teaspoons
  • Cups or fluid ounces
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Question
In how many ways can $6$ different books be arranged on a shelf if a specific book must always be placed last?
Answer:
  • 120
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
The volume of water $(V)$ in a container increases by a factor of $2$ every hour $(t)$. If the container initially has $
Answer:
  • 160 litres
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
True or false: The angle subtended by a chord at the centre of the circle is equal to the angle subtended by the same c
Options:
  • False
  • True
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
A rectangle has a perimeter of $60$ m, and the length is $4$ metres less than twice the width. Which equation represents
Options:
  • $2w+2(w−4)=60$
  • $2w+2(2w−4)=60$
Skip No changes needed
Multiple Choice
Maira bought a gold chain for $\$600$ ten years ago and it now costs $\$1500$. She wants to investigate whether inflatio
Options:
  • D
  • C
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Question
What is the next term in the given sequence? $1,\ 3,\ 11,\ 123,\ \cdots$
Hint: This pattern involves squared terms and addition.
Answer:
  • 15131
Skip No changes needed
Multiple Choice
True or false: The perimeter of a two-dimensional shape is equal to the sum of the length of all the sides.
Options:
  • False
  • True
Skip No changes needed
Question
Find the simple interest if $P = \$200$, $R = 3\%$ p.a., and $T = 1$ year.
Answer:
  • $\$$ 6
Skip No changes needed
Skill: Understanding why a $c$ term needs to be introduced after antidifferentiation
Skip No changes needed
Question
What is the missing term in the given sequence? $-4.75$, $-4.25$, $[?]$, $-3.25$
Answer:
  • -3.75
Skip Metric units — keep as-is for pedagogy
Multiple Choice
Convert $4.5$ tonnes : $750$ kg : $300000$ g into a simplified ratio.
Options:
  • $30 : 5 : 2$
  • $15 : 7 : 1$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
A water tank holds $60$ litres. Each bottle can hold $1.5$ litres. Which two expressions both show how many bottles can
Options:
  • $60 - 1.5x$ and $3(20 - x)$
  • $60 - 1.5x$ and $1.5(60 - 0.5x)$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why is it important to understand parallelograms in maths or in real-life designs?
Answer:
  • Knowing about parallelograms helps us find missing sides and angles. It also helps in real-life work, like tiling floors
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Multiple Choice
Fill in the blank. The slope of a simple interest graph equals the $[?]$.
Options:
  • None of the above
  • Interest paid each year
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A drone flies at a speed of $15$ metres per second. Convert this speed to kilometres per minute.
Answer:
  • 0.9 km/min
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Question
The radius of a circular track is increased by $5$ cm, and its diameter becomes $40$ cm. What was the original radius of
Answer:
  • 15 cm
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Fill in the blank: A water tank is filled at a constant rate of $8$ litres per hour. After $6$ hours, the tank will hav
Answer:
  • 48 litres
Localize School terminology (e.g. Year 7, maths, term dates)
Multiple Choice
Sarah's rectangular cake tin has a base area of $180$ cm$^2$. The length is $3$ cm longer than the width. What are the d
Options:
  • Length $ = 15$ cm, Width $ = 12$ cm
  • Length $ = 14$ cm, Width $ = 11$ cm
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How do you know that combining two $3$ m by $2$ m spaces needs square metres to show the total area?
Hint: Add areas using square units
Answer:
  • Each space is $3$ m by $2$ m, so its area is in square metres. Adding them keeps the total in square metres.
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Show that $12.25$ m$^3$ plus $750$ millilitres is not the same as $13$ litres.
Answer:
  • $12.25$ m$^3 = 12250$ litres and $750$ millilitres = $0.75$ litres. Together they make $12250.75$ litres, which is much
Skip No changes needed
Question
The total surface area of a cone is $90\pi$ cm$^2$. If its radius is $5$ cm, what is its slant height?
Answer:
  • 13 cm
Skip No changes needed
Question
Joe invested $\$20,000$ in an annuity which earns an interest of $12\%$ per annum compounding quarterly. He wants to rec
Answer:
  • 16 quarter-year
Localize Unit references in text (e.g. kilometres→miles)
Multiple Choice
Which of the following is equal to $\$3.50$ ?
Options:
  • One $20c$ coin, two $\$2$ coins
  • Thirty $10c$ coins, one $\$1$ coin
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A kite has an area of $1.2$ m$^2$. One of its diagonals measures $150$ cm. What is the length of the other diagonal in
Answer:
  • 160 cm
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Question
A sum of $\$2000$ amounts to $\$2101.25$ in one year when the interest of $5\%$ is compounded half-yearly. What will the
Answer:
  • $\$$ 2102.54
Skip No changes needed
Question
What makes rounding to significant figures different from decimal places?
Answer:
  • Significant figures keep a set number of important digits, while decimal places fix the number of digits after the decim
Localize Units in math expressions — needs careful conversion
Question
The perimeter of a regular hexagon is $564$ cm. What is the length of one of its sides?
Answer:
  • 94 cm
Skip No changes needed
Multiple Choice
A particle moves in a straight line and its velocity after $t$ seconds is given by $v(t)=3t^2+t$ m/s for $0\leq t\leq 12
Options:
  • None of the above
  • $a(t)=6t+1$ m s$^{-2}$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
A rectangle has a length that is $3$ metres more than its width. If the area of the rectangle is equal to its perimeter
Options:
  • $x(x + 3) = 4x + 3$
  • $x(x + 3) = 2x + 2(x + 3)$
Skip No changes needed
Question
The radius of a spherical asteroid is $10$ km. Find its surface area in terms of $\pi$.
Answer:
  • (400\cdot{\pi}) km$^2$
Skip No changes needed
Multiple Choice
Which of the following is not a unit for measuring the velocity of an object?
Options:
  • None of the above
  • cm s$^{-1}$
Skip No changes needed
Question
A rock has a mass of $90$ g and a volume of $3$ cm$^3$. What is its density?
Answer:
  • 30 g/cm$^3$
Skip No changes needed
Multiple Choice
What is the value of $\sqrt[3]{-216}$?
Options:
  • $-6$
  • $6$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A cuboid-shaped tank has a length of $8$ m and a cross-sectional area of $7$ m$^2$. Calculate the volume of the tank in
Answer:
  • 56000 L
Skip No changes needed
Multiple Choice
An $\fbox{\phantom{4000000000}}$ interest rate is the interest rate for a full year.
Options:
  • monthly
  • annual
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Fill in the blank: $3.2$ litres $+\ 0.175$ litres $+\ 250$ cm$^3\ = [?]$ cm$^3$
Answer:
  • 3625
Skip No changes needed
Multiple Choice
True or false: The total surface area of a cube of side length $0.2$ cm is $2.4$ cm$^2$
Options:
  • False
  • True
Skip No changes needed
Multiple Choice
The volume of a sphere is $288\pi$ cm$^3$. What is its radius?
Options:
  • $9$ cm
  • $8$ cm
Review AI was not confident enough to classify
Question
The lengths of two parallel sides of a trapezium are $12$ cm and $8$ cm, respectively. The distance between the parallel
Answer:
  • 100 cm$^2$
Skip No changes needed
Multiple Choice
Fill in the blank: Two triangles have side lengths of $8$, $12$, $16$ cm and $4$, $6$, $8$ cm. The triangles are similar
Options:
  • SSS
  • AAA
Skip No changes needed
Question
Does adding any two odd numbers always give an even answer? Explain using two examples.
Answer:
  • Yes. For example, $3 + 5 = 8$ and $7 + 9 = 16$. Both answers are even, so adding two odd numbers always makes an even nu
Skip No changes needed
Question
Consider $f(x)=x^2+ax+5$ and $g(x)=x^2-x+5$ and $f(x)=g(x)$. Find the value of $a$.
Answer:
  • $a=$ -1
Skip No changes needed
Question
The volume of the square pyramid is $48$ cm$^3$ and the cube has side length $6$ cm. What is the volume of the composite
Answer:
  • 264 cm$^3$
Skip No changes needed
Question
What is $10$ m$^2$ in cm$^2$ ?
Answer:
  • 100000 cm$^2$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A delivery truck travels at $90$ kilometres per hour. Convert this speed to metres per minute.
Answer:
  • 1500 m/min
Skip No changes needed
Question
Let $P(x) = x^{4} + ax^{3} + bx^{2} + cx + d$. When divided by $(x+1)^{2}$, the quotient is monic with no constant term,
Answer:
  • 1
Skip No changes needed
Question
Why do you need to divide the interest rate by the number of times it is compounded in a year when calculating compound
Answer:
  • The rate is for the year, so dividing it shares the rate across the compounding times, giving the rate to use each time.
Skip No changes needed
Question
What is the $11^{th}$ term of the arithmetic sequence whose first term is $10$ and its common difference is $10$?
Answer:
  • 110
Skip Metric units — keep as-is for pedagogy
Question
A wheel has a diameter that is $2.5$ times the radius of another wheel. If the radius of the second wheel is $12$ cm, wh
Answer:
  • 30 cm
Review AI classifier and verifier disagreed
Question
The volume of a rectangular tank is $2100$ cm$^3$. The base of the tank has dimensions $15$ cm and $8$ cm. What is the
Answer:
  • 17.5 cm
Localize Unit references in text (e.g. kilometres→miles)
Multiple Choice
Which of the following is an example of categorical data?
Options:
  • The heights of students in centimetres
  • The postcodes of students' homes
Skip No changes needed
Question
How many grams are in $2$ kg and $45$ g of peanuts?
Answer:
  • 2045 g
Review AI output was malformed — needs manual review
Question
A particle has velocity function $v(t)=6t^2+4t+1$ cm/s for time $t\geq 0$. Find the change in position of the particle f
Answer:
  • 9.96 m
Skip No changes needed
Multiple Choice
Which of the following is the correct rule of the density function for $\frac{1}{5}X+6$ if $f$ is the probability densit
Options:
  • $\large 5f\left(6x-30\right)$
  • $\large 5f\left(5(x-6)\right)$
Skip No changes needed
Question
A solid is made by joining two cubes of side length $10$ cm along one full face. What is the total surface area of the r
Answer:
  • 1000 cm$^2$
Localize School terminology (e.g. Year 7, maths, term dates)
Multiple Choice
Which of the following can be represented by a discrete random variable?
Options:
  • The amount of water in a $250$mL glass
  • The change in temperature in last $3$ days
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A water tank contains $85$ litres of water. If $8$ litres are used for irrigation, how much water is left in the tank?
Answer:
  • 77 litres
Skip No changes needed
Question
How many mL are there in $40$ cm$^3$ ?
Answer:
  • 40 mL
Skip No changes needed
Question
How is changing $1$ m$^2$ into cm$^2$ different from changing $1$ m into cm?
Answer:
  • Changing $1$ m into cm is just $1$ m = $100$ cm. But $1$ m$^2$ is a square, so you must change both sides: $100$ cm $\ti
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Question
Fill in the blank: $4.5$ mm$^2=[?]$ cm$^2$
Answer:
  • 0.045
Skip No changes needed
Question
Why are road distances measured in km and not m?
Answer:
  • km gives smaller numbers that are easier to read, because roads are very long.
Skip No changes needed
Question
How do you know that the length of a rectangle with area $32$ cm$^2$ and width $4$ cm will be twice the width?
Answer:
  • The area is $32$ cm², so $32 = \text{length} \times 4$. This gives length $= 8$ cm. Because $8$ is double $4$, the lengt
Localize School terminology (e.g. Year 7, maths, term dates)
Subtopic: Financial Maths Calculations
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Question
Fill in the blank. A common ratio of $[?]$ results in a $10\%$ increase from one term of a geometric sequence to the nex
Answer:
  • 1.1
Skip No changes needed
Question
The area of a kite is $2528.75$ cm$^2$. The length of the shorter diagonal is $70\%$ of the length of the longer diagona
Answer:
  • 59.5 cm
Skip No changes needed
Question
Why must both quantities in the ratio $3$ km$:$ $600$ m be written in the same units before simplifying?
Answer:
  • Ratios compare amounts, so both parts need the same unit. Otherwise the comparison is not correct.
Skip No changes needed
Question
How do you know that the $7$th term in the geometric sequence $4, 8, 16...$ is $256$, not $2^7$?
Hint: Count sequence terms
Answer:
  • The sequence starts at $a_1=4$ with ratio $r=2$. The formula is $a_n = a_1 r^{n-1}$. So, $a_7 = 4 \times 2^{7-1} = 4 \ti
Review AI classifier and verifier disagreed
Question
Why do we multiply by $10\ 000$ and not $100$ when changing $1$ m$^2$ into cm$^2$?
Answer:
  • $1$ m = $100$ cm. A square metre has two sides, so both sides change to $100$ cm. That makes $100 \times 100 = 10000$ cm
Skip No changes needed
Question
A company defines a week as $6$ days for their roster. Based on a $365$-day year, how many full company weeks fit into
Answer:
  • 60 weeks
Skip No changes needed
Question
What is $\frac{7}{8}-\frac{4}{8}$ ?
Answer:
  • \frac{3}{8}
Skip Metric units — keep as-is for pedagogy
Question
Fill in the blank: $1.5$ ML $- \,\,950$ kL $=[?]$ L
Answer:
  • 550000
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
The setup cost of a fitness centre is $\$24000$. Maintenance costs $\$12.50$ per member per month, and membership revenu
Answer:
  • 873
Skip No changes needed
Question
Describe the two main steps to find the inverse of a function, such as $y = \frac{2x}{x-1}$.
Answer:
  • The two main steps are: 1) Swap the variables $x$ and $y$ in the equation 2) Algebraically rearrange the new equation t
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why do we group items in sets?
Answer:
  • We group items in sets to organise them, compare them, and see patterns more easily.
Skip No changes needed
Question
A bike is purchased for $\$9,000$. The value of the bike decreases by $20\%$ each year. Find the value the bike value af
Answer:
  • $\$$ 4608
Localize Units in math expressions — needs careful conversion
Question
A round trip from Sydney to Brisbane covers a distance of approximately $1800$ km. If you drive at an average speed of
Answer:
  • 15 h
Localize School terminology (e.g. Year 7, maths, term dates)
Multiple Choice
What does the M stand for in BODMAS?
Options:
  • Magnitude
  • Many
Review AI classifier and verifier disagreed
Multiple Choice
Which statement about simple random sampling is false?
Options:
  • Selection is predictable
  • Random selection is fair
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A tap fills at $0.5$ litres per second. Sam says this equals $30$ litres per minute. How can you prove if he is correc
Answer:
  • Multiply $0.5$ by $60$ because there are $60$ seconds in a minute. $0.5 \times 60 = 30$, so Sam is correct.
Localize Unit references in text (e.g. kilometres→miles)
Question
Why are different units of mass used for objects of different size?
Answer:
  • Some things are light and some are heavy. Grams work better for light things, and kilograms or tonnes work better for he
Skip No changes needed
Multiple Choice
Which of the following is the imperial unit of mass?
Options:
  • Miligrams
  • Pounds
Skip No changes needed
Question
What is $75.254$ $\div \ 100$ ?
Answer:
  • 0.75254
Skip No changes needed
Skill: Understanding alternate angles in transversals
Skip No changes needed
Multiple Choice
The highest power of the variable in a $\fbox{\phantom{4000000000}}$ is $1$
Options:
  • quartic equation
  • quadratic equation
Skip No changes needed
Question
How do you know $\$1000$ at $5\%$ simple interest gives $50$ yearly?
Hint: Calculate yearly interest
Answer:
  • Yearly interest = Principal $\times$ Rate $= \$1000 \times 0.05 = \$50$ per year.
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A rectangular signboard has a width of $x$ metres and its height is twice the width. Write an expression for the area.
Answer:
  • 2{x}^{2} m$^2$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why does changing from kilometres per hour to metres per second change the number but not the speed?
Answer:
  • Only the units change. Since kilometres and hours are larger units than metres and seconds, converting them changes the
Review AI classifier and verifier disagreed
Question
In $\triangle ABC$, $\angle A = 40^\circ$, $BC = 13$ cm, and $AC = 19$ cm. Determine how many distinct triangles can be
Answer:
  • 2
Skip No changes needed
Multiple Choice
$3$ kg of oranges and $4$ kg of apples cost $\$24$. $4$ kg of oranges and $3$ kg of apples cost $\$22$. Which statement
Options:
  • $2$ oranges cost $\$60$
  • $3$ apples cost $\$48$
Skip No changes needed
Question
Write the fifth term, $t_5$, of the sequence given by the recurrence relation $t_0=-2$, $t_{n+1}=-t_{n}$
Answer:
  • $t_5=$ -2
Localize Unit references in text (e.g. kilometres→miles)
Question
Explain why shoe size is a type of discrete data but the length of a shoe is continuous.
Answer:
  • Shoe size is discrete data because it comes in fixed whole or half sizes you can count, but shoe length is continuous be
Skip No changes needed
Question
How does understanding vertical lines relate to identifying functions?
Answer:
  • A vertical line crossing a graph more than once means one $x$ has two $y$-values, so the graph is not a function.
Skip Metric units — keep as-is for pedagogy
Question
The volume of a cone is $75\pi$ cm$^3$. If its radius is $5$ cm, what is its perpendicular height?
Answer:
  • 9 cm
Review AI classifier and verifier disagreed
Question
What is $2000$ litres in m$^3$ ?
Answer:
  • 02 m$^3$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How do you know that a rectangle with its length and width in centimetres will have its area in square centimetres?
Answer:
  • Area comes from multiplying length and width. If both are in centimetres, the area is in square centimetres.
Skip No changes needed
Question
Why does the $90$th percentile represent a higher score than the $10$th percentile?
Answer:
  • Because $90\%$ of the data lies below the $90$th percentile, while only $10\%$ lies below the $10$th percentile.
Skip No changes needed
Question
Fill in the blank: If a plant grows linearly by $2$ cm each week, after $10$ weeks, it will have grown an additional $[?
Answer:
  • 20
Skip No changes needed
Question
Why do quadratic functions curve instead of forming lines?
Answer:
  • A quadratic function has an $x^2$ term. This makes the values grow faster as $x$ changes, so the graph bends into a curv
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How many millilitres are in $1$ cubic centimetre?
Answer:
  • 1 mL
Skip No changes needed
Multiple Choice
A sum $P$ is invested for one year. Account $1$ pays $4\%$ simple interest, earning $I_1$. Account $2$ pays $3\%$ in si
Options:
  • $0.04P = 0.03P + 10$
  • $0.03P = 0.04P + 10$
Localize Units in math expressions — needs careful conversion
Question
A wheel of radius $35$ cm is rolled. How far will it move after $10$ rotations?
Answer:
  • 2199.11 cm
Skip No changes needed
Question
A student factorises $-6x - 12$ as $-(6x - 12)$. How would you explain why this is incorrect?
Answer:
  • Expanding $-(6x - 12)$ gives $-6x + 12$, which does not match $-6x - 12$.
Localize Units in math expressions — needs careful conversion
Multiple Choice
Four bakeries produce dough at different rates. Which bakery produces the most dough per minute?
Options:
  • $0.18$ tonnes per hour
  • $2.4$ kg per minute
Skip No changes needed
Question
Write $y^2 + 4y + 3y + 12$ in factorised form.
Answer:
  • (({y}+3)\cdot({y}+4))
Review AI classifier and verifier disagreed
Question
In triangle $\text{ABC}$, $\angle A=45^\circ,BC=8$ cm and $AC=10$ cm. If $\angle B$ is an acute angle, then find the me
Answer:
  • 62.1 $^\circ$
Skip No changes needed
Multiple Choice
What is $\Large\frac{0}{0.5}$ ?
Options:
  • $1$
  • $0$
Skip No changes needed
Question
What is $\frac{3}{4} \times \frac{5}{4}$ ?
Answer:
  • \frac{15}{16}
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Find the total length, in metres, of the following: $1.25$ km, $38\ 500$ cm and $72\ 000$ mm
Answer:
  • 1707 m
Skip No changes needed
Question
Why does the value of $a$ in $y=a(x-h)^2+k$ decide whether the parabola opens up or down?
Answer:
  • If $a$ is positive, the squared values stay positive so the parabola opens up. If $a$ is negative, the values are flippe
Skip No changes needed
Question
Mary borrowed $\$4000$ at an annual interest rate of $10\%$, compounded monthly, with monthly payments of $\$351.60$. F
Answer:
  • $\$$ 2050.17
Skip No changes needed
Question
Explain why each term in the sequence $3,7,11,15...$ increases by $4$
Hint: Find constant difference
Answer:
  • Difference between consecutive terms is $4$: $7-3=4$, $11-7=4$, $15-11=4$. Constant difference shows arithmetic sequence
Skip No changes needed
Multiple Choice
Evaluate $\int{e^{-mx}}dx$ where $m$ is a constant term.
Options:
  • $\frac{e^{-m}}{mx}+c$
  • $-\frac{e^{-mx}}{m}+c$
Skip No changes needed
Question
Convert $90000$ mL into L.
Answer:
  • 90 L
Skip No changes needed
Question
Why do we use similar steps to long division with numbers when dividing polynomials?
Hint: Divide, multiply, subtract, and bring down the next term.
Answer:
  • Polynomial division follows steps similar to number long division, using subtraction and finding terms iteratively.
Skip No changes needed
Question
What is the next term in the sequence ? $5, 10, 20, ...$
Answer:
  • 40
Skip No changes needed
Multiple Choice
A company's profit increases by $1.08$ times every year. If the profit generated in the first year was $\$10$ Million, h
Options:
  • $\$82.87$ Million
  • $\$60$ Million
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Calculate the volume (in litres) of a cylindrical tank with a height of $5$ m and a base area of $4$ m$^2$.
Hint: 1 m$^3$= 1000 litres
Skip No changes needed
Question
In $\triangle ABC$, $\angle A = 30^\circ$, $BC = 10$ cm, and $AC = 16$ cm. Determine how many distinct triangles can be
Answer:
  • 2
Review AI was not confident enough to classify
Question
What is the total surface area of a $35$ cm long closed cylinder with a diameter of $13$ cm?
Answer:
  • 1694.89 cm$^2$
Skip No changes needed
Question
Find the $5$th term of the geometric sequence $3, 6, 12, 24,\dots$
Answer:
  • 48
Skip No changes needed
Question
An alloy is formed by mixing $1.25$ kg of Metal A, with a density of $7.5$ g/cm$^3$, and $500$ cm$^3$ of Metal B, with a
Answer:
  • 8.78 g/cm$^3$
Skip No changes needed
Question
How do you know a $6$ cm$\times$ $3$ cm $\times$ $2$ cm box and $3$ cm $\times$ $2$ cm $\times$ $6$ cm box are the same?
Answer:
  • Both boxes have the same volume: $6 \times 3 \times 2 = 36$ cm$^3$. Changing the order of multiplication doesn't affect
Localize Units in math expressions — needs careful conversion
Question
An architect is designing a triangular roof. The base of the roof is $19$ metres and the height is $22$ metres. What is
Answer:
  • 209 m$^2$
Review AI was not confident enough to classify
Question
Mia puts $\$500$ into a savings account. The bank pays $4\%$ simple interest each year. How much interest will she earn
Answer:
  • $\$$ 60
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
True or false: Cubic centimetres is an appropriate unit to measure the volume of a wooden plank.
Options:
  • False
  • True
Skip No changes needed
Question
How do you know $3^n$ triples from one term to the next?
Answer:
  • Each time $n$ increases by $1$, another factor of $3$ is multiplied. This makes the next term three times bigger than th
Skip No changes needed
Multiple Choice
Which statement best explains why compound interest causes exponential growth? A) The interest rate increases each year
Options:
  • D
  • C
Skip No changes needed
Question
Why does compound interest grow faster than simple interest?
Answer:
  • Compound interest grows faster than simple interest because interest is calculated on both the principal and previously
Skip No changes needed
Question
An exterior angle of an isosceles triangle is $100^\circ$, and this exterior angle is adjacent to one of the base interi
Answer:
  • 20 $^\circ$
Skip No changes needed
Question
In $\triangle ABC$, $\angle A = 30^\circ$, $BC = 7$ cm, and $AC = 16$ cm. Determine how many distinct triangles can be
Answer:
  • 0
Skip Metric units — keep as-is for pedagogy
Question
Fill in the blank: $\frac{3}{4}$ kg $=[?]$ g
Answer:
  • 750
Skip No changes needed
Question
The volume of the cylinder is $540$ cm$^3$ and the volume of the cone is $180$ cm$^3$. What is the volume of the composi
Answer:
  • 720 cm$^3$
Skip No changes needed
Question
Why do we complete the square to convert a quadratic to turning point form?
Hint: Add and subtract the square term to balance the equation.
Answer:
  • We complete the square to convert a quadratic to turning point form by rewriting it as $(x-h)^2+k$.
Localize Units in math expressions — needs careful conversion
Multiple Choice
A hiker walks $7$ km east, $5$ km south, $3$ km east, then $1$ km north. How far is the hiker from their starting point
Options:
  • $11$ km
  • $10$ km
Skip No changes needed
Question
Hannah started a job in $2010$ with an annual salary of $\$35000$. Each year, she received a pay increase of $\$200$. Wh
Answer:
  • $\$$ 37200
Skip No changes needed
Question
Convert $0.65$ L into mL.
Answer:
  • 650 mL
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why is it important to understand decimal shifts when solving measurement problems?
Answer:
  • Decimal shifts show how numbers get $10$ times bigger or smaller. This helps when changing units, like $2.5$ metres to $
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
A rectangular garden has an area of $120$ m$^2$ and a perimeter of $52$ m, with length $𝑙$ metres and width $𝑤$ metres.
Options:
  • $l = 30$ m, $w = 4$ m
  • $l = 10$ m, $w = 12$ m
Skip No changes needed
Question
Solve for $x$: $\dfrac{1}{x-2}= \dfrac{3x+1}{x^2-4}$
Answer:
  • $x=$ \frac{1}{2}
Skip No changes needed
Question
What is the next term in the sequence? $1,5,13,25,41,\dots$
Hint: $2^2+3^3=13$
Answer:
  • 61
Skip No changes needed
Multiple Choice
A delivery route has three segments. The first segment is $2.8$ km, the next is $1550$ m, and the last is $35000$ cm.
Options:
  • $470$ km
  • $47$ km
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A cyclist travels $12.6$ kilometres in $1.5$ hours. Find the speed in metres per hour.
Answer:
  • 8400 metres per hour
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A floor is in the shape of a rectangle. It has a length of $8.12$ metres and a width of $7.54$ metres. Calculate the a
Answer:
  • 61.22 m$^2$
Skip No changes needed
Multiple Choice
Complete the statement below. The sum of an $n$-term geometric series with first term $a$ and common ratio $r$ is given
Options:
  • $S_n=\frac{a(1+r^n)}{1-r}$ for $r\neq1$
  • $S_n=\frac{a(r^n-1)}{1+r}$ for $r\neq1$
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A submarine's depth is given by $y = 150 + 30 \cos\left(\frac{\pi}{10} t\right)$, where $y$ is the depth below sea level
Answer:
  • 3.33 minutes
Skip No changes needed
Question
Why does $1$ hour equal $3600$ seconds?
Answer:
  • $1$ hour equals $3600$ seconds because there are $60$ seconds in a minute and $60$ minutes in an hour, so $60\times60=36
Review AI classifier and verifier disagreed
Multiple Choice
Olivia borrows $\$5000$ from the bank at a simple interest rate of $6\%$ per annum. After $4$ years, will the amount of
Options:
  • Interest will be variable each year
  • Interest will remain the same each year
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
The height of a point on a bicycle wheel is given by $y = 0.5 + 0.3 \sin(2 \pi t)$, where $y$ is height in metres and $t
Answer:
  • 0.25 seconds
Localize Units in math expressions — needs careful conversion
Question
Fill in the blank: A cyclist rides $5$ km every day. After $14$ days, the total distance travelled will be $[?]$ km.
Answer:
  • 70 km
Skip No changes needed
Question
Fill in the blank: $20060$ g $=20$ kg and $[?]$ g
Answer:
  • 60
Review AI classifier and verifier disagreed
Question
Evaluate $(-1)^{100}$
Answer:
  • 1
Skip No changes needed
Question
Convert $7$ kg and $409$ g into grams.
Answer:
  • 7409 g
Skip No changes needed
Question
A rectangular prism with dimensions $6$ cm $\times$ $4$ cm $\times$ $3$ cm is enlarged by a scale factor of $3$. What i
Answer:
  • 1944 cm$^3$
Skip No changes needed
Question
A sequence decreases by $\dfrac{2}{9}$ each time. If the $15$th term is $-\dfrac{5}{3}$, what is the first term?
Answer:
  • \frac{13}{9}
Skip No changes needed
Question
Why does multiplying two polynomial functions increase the degree of the result?
Answer:
  • The leading terms from each function multiply together, and their powers add, creating a new term with a higher degree.
Skip No changes needed
Question
Explain why the $5$th term in the sequence $2, 6, 18,...$ is $162$
Hint: Apply constant multiplier
Answer:
  • Each term multiplies by $3$: $2 \times 3=6$, $6 \times 3=18$, $18 \times 3=54$, $54 \times 3=162$.
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why does changing the centre angle affect both the sector and triangle areas differently?
Answer:
  • Changing the central angle affects both the sector and triangle areas differently because the angle directly changes the
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
A gardener uses $0.125$ kg of fertiliser per square metre. She fertilises $1000$ m$^2$ of the garden. How much fertilise
Answer:
  • 125 kg
Skip No changes needed
Multiple Choice
Is $\begin{bmatrix} 1&0&0\\0&0&1\end{bmatrix}$ an identity matrix?
Options:
  • No
  • Yes
Skip No changes needed
Question
Find the missing term in the given sequence. $10, 9.8, [?], 9.4, 9.2$
Answer:
  • 9.6
Skip No changes needed
Question
How do you know the discriminant $b^2-4ac=0$ means there is one repeated real root?
Answer:
  • When the discriminant is $0$, the square root term in the formula is $0$, so both solutions are equal. This gives one re
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
How many litres are there in $6$ m$^3$ ?
Answer:
  • 6000 L
Skip No changes needed
Question
Fill in the blank: $(-4)^{-2}=[?]$
Answer:
  • \frac{1}{16}
Skip No changes needed
Question
The area of a sector is $\frac{132}{7}$ cm$^2$ and the central angle is $60^\circ$. What is the diameter of the entire
Answer:
  • 12.002 cm
Skip No changes needed
Multiple Choice
Fill in the blank: Two lines have the same gradient but different $y$-intercepts. These lines are $[?]$
Options:
  • Coincident
  • Cannot be determined
Localize AU/British spelling (e.g. colour→color, centre→center)
Question
Why is it important to organise $x$ and $y$ values in a table?
Answer:
  • A table shows how $x$ and $y$ are linked, keeps the values in order, and helps draw the graph.
Skip Metric units — keep as-is for pedagogy
Multiple Choice
A recipe uses $900$ g of flour and $2.7$ kg of sugar. Express the ratio in grams, in simplest form.
Options:
  • $2:5$
  • $5:7$
Skip No changes needed
Question
A basket has $16$ apples. How do you know there will be $10$ apples if $6$ are taken away?
Answer:
  • $16$ take away $6$ is $10$ because when you remove $6$ apples from $16$, you have $10$ apples left.
Skip No changes needed
Multiple Choice
True or false: ${11}$ is the constant term in $t^2+{11}t-{11}$.
Options:
  • False
  • True
Skip No changes needed
Multiple Choice
Fill in the blank. $745.98$ mL$=[?]$ cm$^3$
Options:
  • $7.4598$
  • $74598$
Localize Units in math expressions — needs careful conversion
Question
Fill in the blank: $0.003$ ML $+ 4.2$ kL $=[?]$ L
Answer:
  • 7200
Skip No changes needed
Question
A triangle has a base length of $15$ cm and a height of $8$ cm. Find the area of the triangle.
Answer:
  • 60 cm$^{2}$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Circle A has the equation $(x - 2)^2 + (y + 3)^2 = 16$. Circle B has the same centre as Circle A, but its radius is ha
Options:
  • $(x - 2)^2 + (y + 3)^2 = 8$
  • $(x - 2)^2 + (y + 3)^2 = 32$
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Water is flowing at a rate of $300$ millilitres per second. How many litres flow in one minute?
Options:
  • $180$ L
  • $18$ L
Localize AU/British spelling (e.g. colour→color, centre→center)
Multiple Choice
Fill in the blank: The point at which both axes intersect is called the $[?]$ on the Cartesian plane.
Options:
  • Cross-point
  • Zero point
Skip No changes needed
Question
Fully factorise the following expression: $-2x^6y^7z^3-4x^3y^3z$
Answer:
  • -2{x}^{3}{y}^{3}{z}({x}^{3}{y}^{4}{z}^{2}+2)
Skip No changes needed
Multiple Choice
True or false: $1$ year is the same as $12$ months.
Options:
  • False
  • True
Skip No changes needed
Question
Explain why subtracting $0.25$ from each term creates a sequence in $2.0, 1.75, 1.5, 1.25,...$.
Answer:
  • Each term is $0.25$ less than the previous: $2.0 - 0.25 = 1.75$, $1.75 - 0.25 = 1.5$, etc. This consistent decrease of $
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Question
How do you know the $5$th term in the geometric sequence $2, 10, 50...$ is $1250$, not $500$?
Hint: Verify sequence terms
Answer:
  • The sequence has $a_1=2$ and common ratio $r=5$. Using $a_n = a_1 \times r^{n-1}$, $a_5 = 2 \times 5^{5-1} = 2 \times 5^
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Question
A city had a population of $54302$ people. In the first half of the year, $12678$ people left. In the second half of t
Answer:
  • 31889
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Question
A sphere has a diameter of $8$ cm. Calculate its volume, leaving the answer in terms of $\pi$.
Answer:
  • \frac{(256{\pi})}{3} cm$^3$
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Question
Find the distance of Miami$(26^\circ{N},80^\circ{W})$ from the equator.
Hint: Take Earth's radius to be $6371$ km
Answer:
  • 2891.07
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Multiple Choice
Fill in the blank: $1$ micrometre $=[?]$ metres
Options:
  • $1000000$
  • $1000$
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Question
How do asymptotes relate to understanding graphs?
Answer:
  • Asymptotes mark lines the graph approaches but never reaches. They help show the behaviour of the graph and where the fu
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Question
For a random variable $F$ , it is known that $Var(F)=9$ . Calculate $sd(5F-11)$ .
Answer:
  • 15
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Question
Delhi, India and Xinjiang, China have coordinates $(29^\circ N,77^\circ E)$ and $(41^\circ N,77^\circ E)$. Calculate th
Answer:
  • 1340.41 km
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Question
How do you know millilitres is not an imperial unit of volume?
Hint: mL is metric, not imperial
Answer:
  • Millilitre is metric unit (1/1000 of litre). Imperial uses fluid ounces, pints, gallons for volume measurement.
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Question
How does finding equivalent fractions relate to comparing $\frac{2}{3}$ and $\frac{3}{4}$?
Answer:
  • Making the fractions have the same denominator helps us see which is bigger. $\frac{2}{3}$ is the same as $\frac{8}{12}$
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Question
Why is Pythagoras’ theorem only applicable for right triangles?
Answer:
  • It only works in right triangles because the $90^\circ$ angle makes the square of the hypotenuse equal the sum of the sq
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Question
Convert $2$ L into mL.
Answer:
  • 2000 mL
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Multiple Choice
A library initially has $10\ 000$ books. Each year, $500$ are added and $150$ are removed. Which recurrence relation des
Options:
  • $B_0 = 10000, B_{n+1} = B_n + 650$
  • $B_0 = 10000, B_{n+1} = B_n + 500$
Localize Units in math expressions — needs careful conversion
Multiple Choice
A delivery company charges a flat fee of $\$15$ plus $\$5$ for every kilometre travelled. If a $10\%$ discount is given
Options:
  • $15 + 0.9(5x)$ and $15 + 4.5x$
  • $15 - 0.1(5x)$ and $14.5x$
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Question
Suppose that a bicycle costs $\$3,450$ today. If inflation averages $1.5\%$ per year, calculate the value of the bicycle
Answer:
  • $\$$ 3661.70
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Question
A large jug holds $2.25$ L. How many $250$ mL cups can be filled from the jug?
Answer:
  • 9
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Question
How do you know a right triangle with height $4$ cm, base $3$ cm is similar to one with height $12$ cm, base $9$ cm?
Answer:
  • The side ratios are the same ($12 ÷ 4 = 3$ and $9 ÷ 3 = 3$), and both have a right angle, so the triangles are similar.
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Multiple Choice
$\fbox{\phantom{4000000000}}$ growth is a type of growth where the quantity increases by a constant amount per unit of
Options:
  • Linear
  • Quadratic
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Question
Explain why $I = P \times R \times T$ is used for simple interest.
Answer:
  • The same interest is added each year since it is based on the principal, so the formula multiplies one year’s interest b
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Question
Find the volume of the composite solid shown below. Image description: A rectangular prism measuring $10$ cm by $8$ cm
Answer:
  • 224 cm$^3$
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Question
Explain why Quadrant I has positive $x$ and $y$ values, while Quadrant III has negative $x$ and $y$.
Answer:
  • In Quadrant I, points are right and above the centre, so both values are positive. In Quadrant III, points are left and
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Multiple Choice
If $A=$$\begin{bmatrix} 0&0&1\\ 0&1&0\\ 1&0&0\\ \end{bmatrix}$ and $B=$$\begin{bmatrix} 1&4&-1\\ 2&-2&2\\ 1&-2&0\\ \end{
Options:
  • $\begin{bmatrix} 2&4&-1\\ 2&1&2\\ -4&0&2\\ \end{bmatrix}$
  • $\begin{bmatrix} 1&4&2\\ 2&1&2\\ 4&-2&0\\ \end{bmatrix}$
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Question
How many litres are there in $7$ m$^3$ ?
Answer:
  • 7000 L
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Question
A student has mastered $50.2\%$ of $500$ maths skills. How many skills remain to be mastered?
Answer:
  • 249 skills
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Question
Explain why the circle $(x + \frac{3}{2})^2 + (y - 3)^2 = 36$ has centre $\left(-\frac{3}{2}, 3\right)$.
Answer:
  • The circle formula is $(x - h)^2 + (y - k)^2 = r^2$. Here $(x + \frac{3}{2})^2$ means $h = -\frac{3}{2}$, and $(y - 3)^2
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Question
Find the volume of the composite solid shown below. Image description: The solid is made from two rectangular prisms. T
Answer:
  • 330 cm$^3$
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Skill: Comparing decimals
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Multiple Choice
For two disjoint sets $P$ and $Q$, we know that $P\cup{Q}=U$, where $U$ is the universal set, which of these statements
Options:
  • $n(P')+n(Q)=n(U)$
  • $n(P)+n(Q')=n(U)$
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Multiple Choice
Which of the following gives the $n^\text{th}$ term of the geometric sequence whose fourth and seventh terms are $24$ an
Options:
  • $t_n=3(8)^{n-1}$
  • $t_n=24(8)^{n-1}$
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Multiple Choice
Which of the following statements is true?
Options:
  • $45$ is greater than $46$
  • $98$ is greater than $99$
Localize Units in math expressions — needs careful conversion
Question
Location coordinates are given as: Point $X$ $=42^\circ{N},170^\circ{E}$ Point $Y$ $=60^\circ{N},170^\circ{E}$ Wha
Answer:
  • 2010.619 km
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Question
Fill in the blank: $600$ cm$^3$ $+\ 0.001$ m$^3=[?]$ cm$^3$
Answer:
  • 1600
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Question
For two places lying on a meridian, their coordinates of the location are $36^\circ{N}$ and $12^\circ{S}$. What is the
Answer:
  • 5361.65 km
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Question
What makes the form $y=a(x-h)^3+k$ useful for graphing cubics?
Answer:
  • It explicitly states the location of the point of inflection, $(h,k)$, which acts as the graph's centre of rotational sy
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Question
Why must we analyse real situations to identify mutually exclusive events?
Answer:
  • Analysing real situations shows whether two events can or cannot happen together, helping us decide if they are mutually
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Multiple Choice
In a geometric sequence, the $k^{th}$ term is $T_k$ and the $(k+2)^{th}$ term is $T_{k+2}$. If $T_k \cdot T_{k+2} = (T_{
Options:
  • $72$
  • $144$
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Question
A fish tank has dimensions $80$ cm $\times$ $50$ cm $\times$ $40$ cm. What is its volume in litres?
Answer:
  • 160 L
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Multiple Choice
True or false: $4\times(20+8)= (4\times 20 ) + (4\times 8)$
Options:
  • False
  • True
Localize Units in math expressions — needs careful conversion
Question
I take two and a half hours to run $1.5$ km. What is my average speed in km per hour?
Answer:
  • 0.6 km/h
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Multiple Choice
Choose the correct symbol to fill in the blank. $9$ $[?]$ $9$
Options:
  • $?$
  • $=$
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Question
Bill makes a purchase of $\$2000$ and pays a deposit of $\$500$ and agrees to pay the rest in $7$ instalments, each wort
Answer:
  • 16.67 $\%$
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Subtopic: Base Ten Logarithms
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Multiple Choice
The price of an electronic bicycle is represented by the regression line: Price $= 900 - 10 \times$ quarter of a year Wh
Options:
  • A unit increase in the response increases the explanatory variable by $900$
  • A unit increase in the explanatory variable decreases the response variable by $10$
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Multiple Choice
A $\fbox{\phantom{4000000000}}$ is a fixed numerical value.
Options:
  • constant
  • variable
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Question
A total of $\$328.80$ including GST was paid for public transport last year. What was the cost excluding GST?
Answer:
  • $\$$ 298.91
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Multiple Choice
A jug has a capacity of $1.5$L. Which of the following best explains what this means?
Options:
  • It is $1.5$ m tall
  • It weighs $1.5$ kg when full
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Multiple Choice
Cubic metres and cubic centimetres are units of $\fbox{\phantom{4000000000}}$
Options:
  • length
  • perimeter
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Question
A rectangular prism has a square base. the height of the prism is twice the length of a side of the base. If $O$ is the
Answer:
  • 70.5 $^\circ$
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Question
What makes monthly compounding use $12$ periods?
Hint: Divide the annual rate by $12$ to find the monthly rate.
Answer:
  • Monthly compounding uses $12$ periods because there are $12$ months in a year.
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Question
Why does multiplying litres by $1000$ always give the number of millilitres?
Answer:
  • There are $1000$ millilitres in each litre, so each litre contributes $1000$ mL.
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Multiple Choice
Which of the following will not maintain mathematical equivalence?
Options:
  • None of the above
  • Substituting a factored form for its expanded form
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Multiple Choice
Which recurrence relation represents a geometric sequence with first term $81$ and common ratio $\dfrac{1}{3}$?
Options:
  • $s_0 = \frac{1}{3}$, $s_{n+1} = \Large \frac{s_n }{81}$
  • $s_0 = 81$, $s_{n+1} = s_n+ \frac{1}{3}$
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Multiple Choice
Creating tables of values helps in understanding the $\fbox{\phantom{4000000000}}$ between variables.
Options:
  • difference
  • product
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Multiple Choice
Which of the following is the general term $u_n$ of the geometric sequence in which $u_5=\frac{3}{16}$ and $u_8=\frac{3}
Options:
  • $u_n=\frac{3}{2^{n-1}}$
  • $u_n=\frac{3}{2^n}$
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Question
Fill in the blank: $1.25$ ML $+ \,\,1500$ L $+ \,\,2.75$ kL $=\ [?]$ ML
Answer:
  • 1.25425
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Question
Explain why $30$ months equals $2$ years and $6$ months
Answer:
  • $1$ year has $12$ months. $2$ years is $12 + 12 = 24$ months. $30$ months is $24$ months + $6$ months. So $30$ months eq
Localize Units in math expressions — needs careful conversion
Question
The latitude and longitude of Beijing, China is $40^\circ N$ and $116^\circ E$ respectively. Find its distance from the
Hint: Take Earth's radius to be $6371$ km
Localize School terminology (e.g. Year 7, maths, term dates)
Question
A man bought a laptop costing $\$15000$. He pays a deposit of $\$3000$. He must pay the remaining amount by making month
Answer:
  • $\$$ 12000
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Question
What is the least possible number of edges in a connected graph having three vertices?
Answer:
  • 2
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Multiple Choice
Fill in the blank: Footwear colour is an example of $[?]$ data.
Options:
  • Nominal
  • Ordinal
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Question
A triangular prism has a right-angled triangle base with $\angle C = 90^\circ$, $AC = 6$ cm, and $BC = 8$ cm. The hypote
Answer:
  • 63.4 $^\circ$
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Question
A rectangular box has dimensions of $2$ cm, $3.3$ cm, and $10$ cm. What is the total surface area of the box?
Answer:
  • 119.2 cm$^2$
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Multiple Choice
Which of the following is the equation of a semicircle with centre at $(1,1)$ and radius $2$ units with its base on $y-$
Options:
  • $x=\pm\sqrt{4-(y-1)^{2}}-1$
  • $y=\pm\sqrt{4+(x-1)^{2}}+1$
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Question
How many years will it take for $\$1500$ to double if it is invested at an annual interest rate of $6\%$, compounded con
Answer:
  • 11.55 year
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Multiple Choice
A chemical solution is $1200$ ml. Each hour, $75$ ml evaporates, and $15$ ml is added. Which recurrence relation repres
Options:
  • $T_0=1200, T_{n+1} = T_n - 75$
  • $T_0= 1200, T_{n+1} = T_n +15$
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Multiple Choice
True or false: Single-stage experiments involve only one action or trial.
Options:
  • False
  • True
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Multiple Choice
Which of the following is not a key property of the function $y = \frac{1}{x^2}$ ?
Options:
  • Range spans positive and negative values
  • Vertical asymptote
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Skill: Naming angles using standard conventions
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Question
An amount $P$ is invested for $3$ years at $R\%$ simple interest. The same $P$ is invested for $2$ years at $(R + 2.5)\
Answer:
  • 5 $\%$
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Question
In a particular geometric sequence, the second term is $2\sqrt{2}$ and the ninth term is $32$. What is the $14^\text{th}
Answer:
  • 128\sqrt{2}
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Multiple Choice
What is the total surface area of a cone if $l$ is slant height, $r$ is the radius of the circular base and $h$ is the v
Options:
  • $\pi{r}(h+l)$
  • $2{\pi}rh$
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Question
Find the smallest distance between the centre of the circle of radius $12$ cm and a chord of length $18$ cm.
Answer:
  • 8 cm
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Multiple Choice
Fill in the blank: A team of talented maths students being selected to represent a school in an interschool maths compet
Options:
  • Systematic sampling
  • Random sampling
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Multiple Choice
Which of the following numbers is larger than $11111$ ?
Options:
  • $1119$
  • $11112$
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Multiple Choice
What is the correct factorisation of $-12x^2y + 6xy^2 - 18x^2y^2$ ?
Options:
  • $-6x^2y(2 - y + 3y)$
  • $-6xy(2x - y + 3xy)$
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Multiple Choice
True or false: A continuous random variable can represent the amount of iron contained in a beaker containing $250$ ml o
Options:
  • False
  • True
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Question
Solve for $x$: $\frac{4.8}{5}-\frac{x}{4}=6$
Answer:
  • $x=$ -20.16
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Question
Why does multiplying every term of an equation by the same number not change the solutions of the system?
Answer:
  • The new equation represents the same line, so all the same solution points still work.
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Question
A grocery store sells milk in cartons of $1$ litre. A customer wants to purchase a total of $3000$ millilitres of milk.
Answer:
  • 3
Localize Units in math expressions — needs careful conversion
Question
A plane flies $100$ km on a bearing of $025^\circ \text{T}$. How far east does the plane fly?
Hint: Use trigonometry to determine the distance travelled.
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Question
A gold bar has a mass of $1000$ g and a density of $19.3$ g/cm$^3$. What is the volume of the gold bar?
Answer:
  • 51.81 cm$^3$
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Question
Why does solving a logarithmic equation often involve rewriting it in exponential form?
Answer:
  • A logarithm shows the power of the base that makes a number, and writing it exponentially reveals that power directly.
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Question
How does understanding percentages help you make sense of different interest rates?
Answer:
  • Interest rates are percentages of the money you start with. Bigger percentages mean more interest is added each year.
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Question
Explain why $x$ in $\frac{7}{x} = 2$ can be found by multiplying both sides by $x$ and then dividing by $2$.
Hint: Isolate variable term
Answer:
  • Multiply both sides by $x$: $7=2x$. Then divide by $2$: $x=\frac{7}{2}$ to isolate variable.
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Question
Fill in the blank. The solutions to the quadratic equation $x^2 - 2x - 3 = 0$ are $x = \frac{2 \pm \sqrt{[?]}}{2}$.
Answer:
  • 16
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Multiple Choice
Find the value of $m$ such that the equation $mx^2 - 2x + 1 = 0$ has exactly one solution.
Options:
  • $0$
  • $1$
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Question
Why do we subtract the discount from the original price to get the final price?
Answer:
  • Because the original cost includes everything, and the discount lowers it.
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Question
Convert $7000$ mL into L.
Answer:
  • 7 L
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Question
How many months in a year have exactly $31$ days?
Answer:
  • 7 months
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Multiple Choice
A scale using exponential increases is called a $\fbox{\phantom{4000000000}}$ scale.
Options:
  • exponential
  • logarithmic
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Question
A rectangular billboard is built with $100$ metres of framing. Its area is modelled by $A = -x² + 50x$ What is the maxim
Answer:
  • 625 m$^2$
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Question
What is the next term in the sequence? $0.6, 1.2, 2.4, \dots$
Answer:
  • 4.8
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Question
Map A uses a scale of $1$ cm = $1$ km. Map B uses a scale of $1$ cm = $0.5$ km. A road appears $6$ cm long on Map A. How
Answer:
  • 12 cm
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Question
An architect is designing a triangular balcony. The base of the balcony is $15$ metres, and the height is $20$ metres. W
Answer:
  • 150 m$^2$
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Question
Express $\log_{3}{5}+\log_{3}{2}+\log_{3}{4}$ as a single logarithm.
Answer:
  • \log_{3}(40)
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Multiple Choice
True or false: The cubic metre (m$^3$), is a base SI unit.
Options:
  • True
  • False
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Question
Convert $3.9$ kg into grams.
Answer:
  • 3900 g
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Question
How do you know that a square with area $16$ cm$^2$ cannot have a side length of $5$ cm?
Hint: Square area = side$^2$
Answer:
  • Square area $= \text{side}^2$. If side $= 5$ cm, area would be $25$ cm$^2$, not $16$ cm$^2$.
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Question
How many mL are there in $3.5$ L ?
Answer:
  • 3500 mL
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Question
John borrowed $\$4000$ at $10\%$ annual interest, compounded monthly, with monthly payments of $\$351.60$. What is his
Answer:
  • $\$$ 352.4
Localize Units in math expressions — needs careful conversion
Question
Find the radius of the circle in which the central angle of $\frac{\pi}{3}$ intercepts an arc of length $37.4$ cm.
Answer:
  • 35.7 cm
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Question
What factor does the SI prefix ‘kilo-’ represent in terms like kilogram or kilometre?
Answer:
  • 1000
  • 10^3
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Question
Why does converting from a smaller unit (like mL) to a larger unit (like L) make the number smaller, even though the amo
Answer:
  • Litres are bigger units. The same amount of liquid needs fewer litres than millilitres to describe it.
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Question
Find the missing term in the sequence: $1.50, 2.50, 6.50, 13.50, 23.50, 36.50, [ ? ]$
Answer:
  • 52.50
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Question
Naruto runs a total distance of $800$ meters while using his Sage Mode. How long did it take him to cover this distance
Answer:
  • 13.33 second
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Multiple Choice
True or false: In reducing balance loans, the balance owed is reduced by half after every depreciation term.
Options:
  • False
  • True
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Question
The area of the circular base of a cone is $20$ m$^2$ and its height is $9$ m. Find the volume of the cone to the neare
Answer:
  • 60 m$^3$