Square Root and Cube Root Questions and Answers
Important Square Root and Cube Root Aptitude Questions:
17. The least perfect square, which is divisible by each of 21, 36 and 66 is:
(A) 213444
(B) 216344
(C) 214435
(D) 231564
Ans . A
18. Find the smallest number by which 5808 should be multiplied so that the product becomes a perfect square.
(A) 1
(B) 3
(C) 5
(D) 7
Ans . B
19. What is the smallest number to be subtracted from 549162 in order to make it a perfect square?
(A) 14
(B)28
(C) 56
(D) 81
Ans . D
20. The smallest number added to 680621 to make the sum a perfect square is:
(A) 4
(B) 5
(C) 7
(D)9
Ans . A
21. The least number of 4 digit which is a perfect square, is:
(A) 1000
(B) 1014
(C) 1024
(D) 1036
Ans . C
22. A General wish to draw up his 36581 soldiers in the form of a solid square. After arranging them, he found that some of them are left over. How many are left?
(A) 72
(B) 81
(C) 100
(D) 110
Ans . C
23.The cube root of 0.000216 is:
(A) 0.006
(B) .06
(C) 0.6
(D) None of these
Ans . B
24. By what least number 675 be multiplied to obtain a number which is a perfect cube?
(A) 5
(B) 7
(C) 9
(D) 11
Ans . A
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