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Source: — Data Sufficiency |
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by iamseer » Thu May 06, 2010 10:44 pm
possibilities: ABCDE

From 1:

x y z xyz xy
-2 -3 4 >1 >1
-2 3 -4 >1 <1

NOT SUFFICIENT

possibilities: BCE
From2:

x y z (xyz)^2 xy
-2 -3 -4 >1 >1
-2 3 -4 >1 <1

NOT SUFFICIENT

possibilities: CE
x y z xyz (xyz)^2 xy
-2 -3 4 >1 >1 >1
-2 3 -4 >1 >1 <1

NOT SUFFICIENT

Therefore E
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by moliver » Fri May 07, 2010 1:12 pm
colakumarfanta wrote:Q x, y, z, are integers Is xy <1 ?
1) xyz > 1
2) xyz ^2 > 1
the ^2 in 2) is for z or for (xyz) two different answers
thanks!
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