Class 8 Maths – Chapter 7
Cubes & Cube Roots
MCQs (Multiple Choice Questions)
1. The cube of 5 is:
a) 15 b) 25 c) 125 d) 75
Answer: c) 125
2. Which of the following is a perfect cube?
a) 64 b) 81 c) 100 d) 144
Answer: a) 64
3. The cube root of 216 is:
a) 4 b) 5 c) 6 d) 8
Answer: c) 6
4. Which number has 27 as its cube?
a) 9 b) 3 c) 6 d) 81
Answer: b) 3
5. The cube root of 1 is:
a) 0 b) 1 c) −1 d) 3
Answer: b) 1
6. If n³ = 512, then n is:
a) 6 b) 7 c) 8 d) 9
Answer: c) 8
7. How many factors does a perfect cube have?
a) Even number b) Odd number c) Prime d) Two
Answer: a) Even number
8. The cube of an even number is always:
a) Odd b) Prime c) Even d) Zero
Answer: c) Even
9. Which of the following is not a perfect cube?
a) 125 b) 343 c) 512 d) 243
Answer: d) 243
10. The cube root of 729 is:
a) 7 b) 8 c) 9 d) 6
Answer: c) 9
📝 Exam Tip
- Memorise cubes from 1³ to 10³
- Perfect cubes always come in groups of three prime factors
- Cube root questions are frequently asked in MCQs
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