MCQ Questions for Class 8 Maths: Ch 7 Cubes and Cube Roots

MCQ Questions for Class 8 Maths: Ch 7 Cubes and Cube Roots

1. Ones place digit in the cube of 5832 is ______.
(a) 5
(b) 7
(c) 2
(d) 8
► (d) 8

2. What is the cube of double of ‘a’?
(a) 16a3
(b) 2a
(c) 8a3
(d) 4a2
► (c) 8a3

3. If (2744)1/3 = 2p+2, then the value of P is
(a) 3
(b) 6
(c) 2
(d) 8
► (b) 6

4. Each prime factor appears _________ times in its cube?
(a) 2
(b) 3
(c) 1                             
(d) 4
► (b) 3

5. The value of 53 is __________.
(a) 125
(b) 15
(c) 10                         
(d) 75
► (a) 125

6. A natural number is said to be a perfect cube, if it is the cube of some _________.
(a) natural number
(b) square number
(c) cube number
(d) cuboid number
► (a) natural number

7. The square of a natural number subtracts from its cube comes 100. The number is __________.
(a) 2
(b) 3
(c) 5
(d) 1
► (c) 5

8. The expansion of a3 is ___________.
(a) 3 × a
(b) a + a + a
(c) 3 × 3 × 3
(d) a × a × a
► (d) a × a × a

9. If volume of cube is 4913cm³ then length of side of cube is
(a) 16 cm
(b) 17 cm
(c) 18 cm
(d) 19 cm
► (b) 17 cm

10. What will be the unit digit of the cube of a number ending with 6 ?
(a) 4             
(b) 6
(c) 2                           
(d) 8
► (b) 6

11. The numbers 1, 8, 27... are ______.
(a) negative numbers
(b) cube numbers
(c) square numbers
(d) none of these
► (b) cube numbers

12. The cube of 23 is ___________
(a) 2304
(b) 23
(c) 12167
(d) 529
► (c) 12167

13.The smallest natural number by which 704 must be divided to obtain a perfect cube is
(a) 22
(b) 12
(c) 11                           
(d) 13
► (c) 11                           

14. Express 63 as the sum of odd numbers.
(a) 31 + 33 + 35 + 37 + 39 + 41 + 43
(b) 31 + 33 + 35 + 37 + 39 + 41
(c) 31 + 33 + 35 + 37 + 39 + 41 + 43 + 45
(d) none of these
► (b) 31 + 33 + 35 + 37 + 39 + 41

15. The symbol for cube root is __________.
(a) √3
(b) ∛
(c) 2√3
(d) 3√3
► (b) ∛

16. The cube of an odd number is always __________.
(a) odd number       
(b) even number
(c) prime number     
(d) none of these
► (a) odd number       

17. What will be the unit digit of the cube root of a number ends with 8?
(a) 2     
(b) 8
(c) 4
(d) 6
► (a) 2     

18. The cube root of the 216 x (−32) x 54 is ________
(a) -36
(b) -72
(c) -48
(d) none of these
► (b) -72

19. Ones digit of cube of a number depends on the ________ of the number.
(a) tens digit
(b) ones digit
(c) hundred digit
(d) none of these
► (b) ones digit

20. If (504 + p) is a perfect cube number, whose cube root is p, then p = ______.
(a) 6
(b) 4
(c) 2
(d) 8
► (d) 8

21. How many digits will be there in the cube root of 46656 ?
(a) 2
(b) 1
(c) 3 
(d) 4
► (a) 2

22. Find the cube root of 0.001331.
(a) 0.111
(b) 0.101
(c) 0.11
(d) none of these
► (c) 0.11
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