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# m04 #24

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Intern
Joined: 22 Sep 2008
Posts: 11

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09 Oct 2008, 18:18
Is x=0?

1. xy=x

2. x+y=y

Please explain why statement 1 is insufficient.

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Joined: 12 Jul 2008
Posts: 511
Schools: Wharton

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09 Oct 2008, 19:48
gmat4life wrote:
Is x=0?

1. xy=x

2. x+y=y

Please explain why statement 1 is insufficient.

when y = 1, x can be any number.
Retired Moderator
Joined: 05 Jul 2006
Posts: 1731

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10 Oct 2008, 04:52
gmat4life wrote:
Is x=0?

1. xy=x

2. x+y=y

Please explain why statement 1 is insufficient.

from 1

x(y-1) = 0

thus either x = 0 or y =1........insuff

from 2

x = y-y = 0.......suff

B

--== Message from GMAT Club Team ==--

This is not a quality discussion. 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.
Re: m04 #24 &nbs [#permalink] 10 Oct 2008, 04:52
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# m04 #24

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