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

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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

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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

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20. The smallest number added to 680621 to make the sum a perfect square is:

(A) 4

(B) 5

(C) 7

(D)9

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21. The least number of 4 digit which is a perfect square, is:

(A) 1000

(B) 1014

(C) 1024

(D) 1036

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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

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23.The cube root of 0.000216 is:

(A) 0.006

(B) .06

(C) 0.6

(D) None of these

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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

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