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GMAT Prep - DS Number Props

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GMAT Prep - DS Number Props [#permalink] New post 30 Jun 2008, 22:36
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Why is A not sufficient to answer question?
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Re: GMAT Prep - DS Number Props [#permalink] New post 30 Jun 2008, 22:44
albertrahul wrote:
Why is A not sufficient to answer question?


Cause if you solve that one you get the equation y^2=1 hence y could be either -1 or 1 hence insufficient
But statement 2 is sufficient and hence the ans should be B
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Re: GMAT Prep - DS Number Props [#permalink] New post 30 Jun 2008, 22:48
I thought of same thing too, but needed confirmation :)
Thanks!
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Re: GMAT Prep - DS Number Props   [#permalink] 30 Jun 2008, 22:48
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