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If X-Y > 10 is X-Y>X+Y 1) X = 8 2) Y = -20 All the

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Senior Manager
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If X-Y > 10 is X-Y>X+Y 1) X = 8 2) Y = -20 All the [#permalink] New post 02 Jun 2006, 08:40
If X-Y > 10 is X-Y>X+Y

1) X = 8

2) Y = -20

All the usual options in Data Sufficiency. Please explain.
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 [#permalink] New post 02 Jun 2006, 09:24
I will go with D...

If x - y > 10...and x = 8

then 8 - y > 10...so y < -2 so x - y > x + y...suffi.

If x - y > 10 ... and y = -20

then x - (-20) > 10...so x > -10 so x - y > x + y...suffi.
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 [#permalink] New post 02 Jun 2006, 09:48
Agree with mahesh004, D.

Same explanation
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Re: Data Sufficiency - GMATPREP Question [#permalink] New post 02 Jun 2006, 10:23
axl_oz wrote:
If X-Y > 10 is X-Y>X+Y

1) X = 8
2) Y = -20


X-Y>X+Y
X-X>Y+Y
0 >2Y


from i, x = 8
8-Y > 10
8-10 > y
-2>y. so suff.

from ii, y = -20. 2(-20) is <0. suff...

D
Re: Data Sufficiency - GMATPREP Question   [#permalink] 02 Jun 2006, 10:23
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