The question can be simply narrowed down to " is n odd?" (3 ^n)/4 leaves remainder 3 if n is odd and it leaves remainder 1 of n is even. As 3^8 is leaving remainder 1, we need 3^n to leave remainder 3 and hence n has to be odd.
From statement 1 n can be either odd or even so insuff.
Statement 2 : we can infer that n+2 is odd and hence n is odd sufficient.
OA: B
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From statement 1 n can be either odd or even so insuff.
Statement 2 : we can infer that n+2 is odd and hence n is odd sufficient.
OA: B
Sent from my Moto G (5) Plus usingGMAT Club Forum mobile app
...



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