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
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
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
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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
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
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Explanation: Factorizing 389017 we get:
389017 = 73×73×73
Cube root of 389017 is 73.
6. What is the cube root of 125?
a) 4
b) 5
c) 6
d) 7
View Answer
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
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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
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
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
Explanation: Factorizing 50653 we get:
50653 = 37×37×37
Cube root of 50653 is 37.
Sanfoundry Global Education & Learning Series – Mathematics – Class 8.
To practice all chapters and topics of class 8 Mathematics, here is complete set of 1000+ Multiple Choice Questions and Answers.
