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

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Manager
Joined: 15 Mar 2014
Posts: 128
Location: India
GPA: 3.5
WE: Operations (Telecommunications)
When Y is divided by 2, is the remainder 1? [#permalink]

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16 Mar 2017, 06:13
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Question Stats:

72% (00:36) correct 28% (00:49) wrong based on 76 sessions

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

1. $$(-1)^{(Y+2)}$$ = -1
2. Y is prime
[Reveal] Spoiler: OA

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Director
Joined: 05 Mar 2015
Posts: 962
Re: When Y is divided by 2, is the remainder 1? [#permalink]

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16 Mar 2017, 06:54
ashwink wrote:
When Y is divided by 2, is the remainder 1?

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

(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
Re: When Y is divided by 2, is the remainder 1?   [#permalink] 16 Mar 2017, 06:54
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# When Y is divided by 2, is the remainder 1?

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