Square Root and Cube Root - Arithmetic Aptitude Questions and Answers

Home / Arithmetic Aptitude / Square Root and Cube Root :: Discussion

The least perfect square, which is divisible by each of 21, 36 and 66 is:

144

196

Answer : Option A

Explanation :

3√5 + √125 = 17.88

3√5 + √25 x 5 = 17.88

3√5 + 5√5 = 17.88

8√5 = 17.88

√5 = 2.235

√80 + 6√5 = √16 x 5 + 6√5

= 4√5 + 6√5

= 10√5 = (10 x 2.235) = 22.35

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