Cube Roots - Class 8 Maths MCQ

This set of Class 8 Maths Chapter 7 Multiple Choice Questions & Answers (MCQs) focuses on “Cube Roots”.

1. Which symbol represents cube root of x?
a) x²
b) x³
c) ∛x
d) √x
View Answer

Answer: c
Explanation: ∛x represents cube root of x. √x represents square root of x. x² represents square of x. x³ represents cube of x.

2. Find the cube root of 226981?
a) 61
b) 62
c) 63
d) 64
View Answer

Answer: a
Explanation: Factorizing 226981 we get:
226981 = 61×61×61
Cube root of 226981 is 61.

3. What is the cube root of 343?
a) 4
b) 5
c) 6
d) 7
View Answer

Answer: d
Explanation: Factorizing 343 we get:
343 = 7×7×7
Cube root of 343 is 7.

4. What is the cube root of 1331?
a) 10
b) 11
c) 12
d) 13
View Answer

Answer: b
Explanation: Factorizing 1331 we get:
1331 = 11×11×11
Cube root of 1331 is 11.

5. What is \(\sqrt[3]{389017}\)?
a) 73
b) 75
c) 77
d) 79
View Answer

Answer: a
Explanation: Factorizing 389017 we get:
389017 = 73×73×73
Cube root of 389017 is 73.

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6. What is the cube root of 125?
a) 4
b) 5
c) 6
d) 7
View Answer

Answer: b
Explanation: Factorizing 125 we get:
125 = 5×5×5
Cube root of 125 is 5.

7. What is square and cube of 14?
a) 2744, 196
b) 196, 2744
c) 196, 2748
d) 2744, 195
View Answer

Answer: b
Explanation: Square of 14 is 14×14 which gives us 196.
Cube of 14 is 14×14×14 which gives us 2744.

8. Evaluate \(\sqrt[3]{614125}\).
a) 45
b) 55
c) 65
d) 85
View Answer

Answer: d
Explanation: Factorizing 614125 we get:
614125 = 5×5×5×17×17×17
Cube root of 614125 is 85.

9. What is the cube root of 729000?
a) 40
b) 50
c) 90
d) 70
View Answer

Answer: c
Explanation: Factorizing 729000 we get:
729000 = 9×9×9×10×10×10
Cube root of 729000 is 90.

10. What is the cube root of 50653?
a) 34
b) 35
c) 36
d) 37
View Answer

Answer: d
Explanation: Factorizing 50653 we get:
50653 = 37×37×37
Cube root of 50653 is 37.

Sanfoundry Global Education & Learning Series – Mathematics – Class 8.

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