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

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Manager
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Joined: 15 Mar 2014
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When Y is divided by 2, is the remainder 1?  [#permalink]

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New post 16 Mar 2017, 07:13
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When Y is divided by 2, is the remainder 1?

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

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Re: When Y is divided by 2, is the remainder 1?  [#permalink]

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New post 16 Mar 2017, 07:54
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

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Re: When Y is divided by 2, is the remainder 1?  [#permalink]

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New post 12 Oct 2018, 07:12
hello Bunuel
in the first statment , why we cannot assume that y = 1 so st1 is insuff.?
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Re: When Y is divided by 2, is the remainder 1?   [#permalink] 12 Oct 2018, 07:12
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When Y is divided by 2, is the remainder 1?

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