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IS (X+Y)^3 an even integer? (1)X and Y are integers. (2)XY=9

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Director
Joined: 01 Apr 2008
Posts: 811
Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
IS (X+Y)^3 an even integer? (1)X and Y are integers. (2)XY=9  [#permalink]

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04 Jul 2009, 21:45
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IS (X+Y)^3 an even integer?
(1)X and Y are integers.
(2)XY=9

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Manager
Joined: 28 Jan 2004
Posts: 198
Location: India

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05 Jul 2009, 00:07
2
C.

Stmt 1 -
Only tell X,Y are integers. Clearly insuff.

Stmt 2 -
XY = 9
There can be many values of X,Y which can satisfy this like
X = 2/3 Y = 27/2 etc.

Combine -
Since X and Y are integers so only possible vaues of X and Y are
X = 1,-1 and Y = 9,-9
X = 3,-3 and Y = 3,-3
In either case x + y is even so (x+y)^3 is also even.
Director
Joined: 01 Apr 2008
Posts: 811
Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014

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05 Jul 2009, 07:51
OA is C. Thanks

I was trapped by the Shell Game I got B coz i assumed X and Y to be integers.
Manager
Joined: 28 Jan 2004
Posts: 198
Location: India

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05 Jul 2009, 10:00
Man when it comes to DS.................NEVER ASSUME
Non-Human User
Joined: 09 Sep 2013
Posts: 8134
Re: IS (X+Y)^3 an even integer? (1)X and Y are integers. (2)XY=9  [#permalink]

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08 Nov 2017, 00:27
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--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: IS (X+Y)^3 an even integer? (1)X and Y are integers. (2)XY=9 &nbs [#permalink] 08 Nov 2017, 00:27
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