You stack 10³ pancakes, and each one is 0.6 cm thick. How tall is the tower?
600 cm
Your alarm rings every 8 minutes, and your brother's alarm rings every 12 minutes. Both ring together at 6:00 a.m. When do they next ring together?
6:24 a.m.
A cube-shaped magic box has a volume of 216 cm³. How long is one edge?
6 cm
Expand −3(2y − 5).
−6y + 15
Two fireflies flash every 6 seconds and every 8 seconds. They flash together at the start. How many more times will they flash together in the next 2 minutes?
5
1 = 1², 1 + 3 = 2², 1 + 3 + 5 = 3²… What is 1 + 3 + 5 + … + 29?
225
Three consecutive integers add up to −33. What are they?
−12, −11, −10
Zombies can only enter the haunted house if they are under 120 cm tall. Which inequality shows a zombie height, h, that can go in?
h < 120
A 4250 g pizza is shared equally between 10² hungry students. How much does each student get?
42.5 g
Bao says 7y − 7y = y. What is the correct answer?
0
A dog walker charges $5 to start, plus $3 for every dog. Write a formula for the cost, C, of walking d dogs.
3d + 5
Simplify 3y/4 − y/6.
7y/12
A blue whale weighs about 10⁵ kg and a cat weighs about 10 kg. How many times heavier is the whale?
10 000
Linh buys 5 identical comics and pays with a $50 note. She gets $15 change. How much does one comic cost?
$7
A submarine is at −45 m. It rises 18 m, then dives 30 m. Where is it now?
−57 m
Work out a² − 3ab when a = −2 and b = 5.
34
A pirate has 48 gold coins and 72 silver coins. She shares them into identical treasure chests with nothing left over. What is the greatest number of chests she can fill?
24
A field is (2x + 3) m long and (x − 1) m wide. Its perimeter is 34 m. Find x.
Which number is both a square number and a cube number?
64
F = 9C/5 + 32. Hanoi reaches 35 °C. What is the temperature in °F?
95
The safe code 3★84 can be divided by both 4 and 9. What is the missing digit ★?
3
A flea jumps 0.06951 m. Round this to 3 decimal places.
0.070
A dragon has 5 × 10⁴ + 3 × 10¹ gold coins. How many coins is that?
50 030
Bubble tea costs $b and one cake costs $5. Four friends each buy one bubble tea and two cakes. Write an expression for the total cost.
4(b + 10)