IMOClass 8 › Chapter Test

Cubes & Cube Roots — Chapter Test

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Q1
1, 8, 27, 64 are cubes. What comes next?
5³ = 125.
Q2
Which of these is a perfect cube?
64 = 4³.
Q3
What is the cube root of 1?
1³ = 1.
Q4
What is the cube of 2?
2 × 2 × 2 = 8.
Q5
What is 4³?
4 × 4 × 4 = 64.
Q6
What is 5³?
5 × 5 × 5 = 125.
Q7
What is the cube root of 125?
5³ = 125.
Q8
What is the cube root of 216?
6³ = 216.
Q9
What is 6³?
6 × 6 × 6 = 216.
Q10
What is the cube root of 729?
9³ = 729.
Q11
A cubic box has side 5 cm. What is its volume?
5³ = 125 cm³.
Q12
A cube has volume 64 cm³. What is its side?
∛64 = 4 cm.
Q13
What is the cube root of 1000?
10³ = 1000.
Q14
A cube has volume 343 cm³. What is the total length of all 12 edges?
Side = ∛343 = 7 cm, so 12 × 7 = 84 cm.
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