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GMATPrep Practice Test 1

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Source: — Data Sufficiency |
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by killer1387 » Fri Apr 13, 2012 11:23 pm
niketdoshi123 wrote:Is |x-y| > |x|-|y|

1)y<x
2)xy<0
Its B
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by sam2304 » Fri Apr 13, 2012 11:35 pm
niketdoshi123 wrote:Is |x-y| > |x|-|y|

1)y<x
2)xy<0
First note that we don't have sign of x or y.

1.y<x
x = 5, y = 2
|x-y| > |x|-|y| - No

x = 5, y = -2
|x-y| > |x|-|y| - Yes

INSUFF

2. xy<0 => Any one of them is negative
So |x - y| = will be sum of two terms
|x| - |y| = will be difference of two terms
|x-y| > |x|-|y| => Sum is always greater than the difference.
SUFF

IMO B.
Getting defeated is just a temporary notion, giving it up is what makes it permanent.
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by sureshs » Sat Apr 14, 2012 4:41 am
100% B.
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