pathakshashi wrote:

If c & d are positive, is d an integer ?

i) c=d^3

ii) d=\sqrt{c}

My answer is C and below is the explanation.

i) c=d^3 -> c & d can have multiple fraction values to satisfy this equation. Hence Insuff.

ii) d=\sqrt{c} -> Here as well, c & d can have multiple fraction values to satisfy this equation. Hence Insuff.

Putting together -> d = square_root (d^3) and this equation can have only one value, which is d =1. Hence C is the answer.

Cheers!

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