When Y is divided by 2, is the remainder 1?

Question

1.  (-1)^{(Y+2)}  = -1
2. Y is prime

rohit8865 · Answer

(1) -1^a= -1 only when a= odd
thus here a= Y+2 = Y+even thus Y is odd
suff

(2) if Y=2 then No(remainder 0)
if Y=3 then Yes (remainder 1)
insuff

Ans A

TestPrepUnlimited · Answer

This is the same as asking if Y is odd.

Statement 1:

This is only true if the exponent is odd, hence Y+2 is odd and Y is odd. Sufficient.

Statement 2:

Not all primes are odd. Insufficient.

Ans: A

Deepakjhamb · Answer

q is asking is y odd

statement 1 - yes definately y is odd

statement 2 - y can be even 2 or odd any other prime

so answer a

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