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GMAT Prep Num Prop Question

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Source: — Data Sufficiency |
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by Nycgrl » Sun Jun 22, 2008 5:35 pm
Ans is D

1. X=8 for X-Y> 10 ....Y ahs to be -ve ......if Y is -ve X-Y> X+Y----suff
2. Y= -20 for X-Y> 10 , X >=-9 .....if X is <9>X+Y----suff
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