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If x and y are positive integers and m25 q1

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CIO
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If x and y are positive integers and m25 q1 [#permalink] New post 15 Feb 2012, 05:48
If x and y are positive integers and \frac{x}{y} is an even integer, which of the following cannot be an odd integer?

A. y
B. x + y
C. y - 1
D. xy
E. y^2

m25 q13
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Expert Post
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Re: X/Y is an even integer (m25#13) [#permalink] New post 27 Mar 2012, 02:47
Expert's post
If x and y are positive integers and \frac{x}{y} is an even integer, which of the following cannot be an odd integer?

A. y
B. x + y
C. y - 1
D. xy
E. y^2

Given: \frac{x}{y}=even --> x=y*even, since y is an integer then x=even, hence xy (option D) is always even.

Answer: D.

To discard options A, B and E consider x=6 and y=3, and to discard option C, consider x=4 and y=2.
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Manager
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iF X AND Y are positive Integers...? [#permalink] New post 20 May 2013, 13:26
If x and y are positive integers and xy is an even integer, which of the following cannot be an odd integer?
A. y
B. x+y
C. y−1
D. xy
E. 2y

got lost here
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Concentration: General Management, Technology
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Re: iF X AND Y are positive Integers...? [#permalink] New post 20 May 2013, 13:32
madzstar wrote:
If x and y are positive integers and xy is an even integer, which of the following cannot be an odd integer?
A. y
B. x+y
C. y−1
D. xy
E. 2y

got lost here


I am a lil lost over the choices mentioned here as well. The question clearly mentions xy is even, but since x and y are positive integers, 2y will be even as well for obvious reasons. Please check the source, since the choices show some redundancy,

Regards,
Arpan
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Expert Post
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Re: iF X AND Y are positive Integers...? [#permalink] New post 20 May 2013, 13:58
Expert's post
Re: iF X AND Y are positive Integers...?   [#permalink] 20 May 2013, 13:58
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