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Cubes and Cube Roots — Class 8 CBSE Mathematics MCQs with Solutions
Free Class 8 CBSE Mathematics Cubes and Cube Roots MCQs with step-by-step solutions. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — easy
Which of these is a perfect cube?
A. 100
B. 121
C. 125 ✓ Correct
D. 150
Solution: 125 = 5³.
Q2 — easy
What is 10³?
A. 30
B. 100
C. 1000 ✓ Correct
D. 10000
Solution: 10 × 10 × 10 = 1000.
Q3 — easy
The cube root of 8 is:
A. 2 ✓ Correct
B. 3
C. 4
D. 8
Solution: 2³ = 8.
Q4 — hard
If the volume of a cube is 4913 cm³, find its edge.
A. 13 cm
B. 17 cm ✓ Correct
C. 19 cm
D. 21 cm
Solution: 17³ = 4913.
Q5 — hard
The cube root of 0.064 is:
A. 0.2
B. 0.4 ✓ Correct
C. 0.6
D. 0.8
Solution: 0.4³ = 0.064.
Q6 — hard
How many perfect cubes lie between 1 and 1000 (both included)?
A. 8
B. 9
C. 10 ✓ Correct
D. 11
Solution: 1³ through 10³ — that is 10 cubes.
Q7 — medium
The smallest number by which 72 must be multiplied to become a perfect cube is:
A. 2
B. 3 ✓ Correct
C. 6
D. 9
Solution: 72 = 2³ × 3²; multiply by 3 to get 216.
Q8 — medium
What is 15³?
A. 2250
B. 3175
C. 3375 ✓ Correct
D. 3575
Solution: 15 × 15 × 15 = 3375.
Q9 — medium
The cube of an even number is always:
A. odd
B. even ✓ Correct
C. prime
D. a square
Solution: Even × even × even is even.