Problems on Square Root and Cube Root Questions & Answers - 2

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Question: 6

The value of $$√{0.16/0.4}$$ is

(A) 0.2

(B) 0.02

(C) 0.002

(D) 0.63

Ans: D

$$√{0.16/0.4}$$ = $$√{0.16/0.40}$$ = $$√{16/40}$$ = $$√{4/10}$$ = $$√0.4$$ = 0.63.

Question: 7

What smallest number must be added to 710 so that the sum is a perfect cube?

(A) 11

(B) 14

(C) 19

(D) 21

Ans: C

Required number to be added = 93 - 710 =729 – 710 = 19.

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