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Prep question practice exam 2

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Source: — Data Sufficiency |
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by 800GMAT » Sun Jun 03, 2007 7:14 am
E
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by Fab_Vr6 » Sun Jun 17, 2007 12:49 pm
why is this E?
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by Fab_Vr6 » Sun Jun 17, 2007 12:58 pm
why is this E?
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by 800GMAT » Sun Jun 17, 2007 2:16 pm
If Zt< -3, is Z< 4?

1) Z<9
z=5 and t=-5 ;is Z< 4---NO
Z=3 and t=-5 ;is Z< 4---YES

2) t<-4
z=5 and t=-5 ;is Z< 4---NO
Z=3 and t=-5 ;is Z< 4---YES

1 and 2: Z<9 and t<-4
z=5 and t=-5 ;is Z< 4---NO
z=3 and t=-5 ;is Z< 4---YES

Hence E
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by II » Thu Aug 28, 2008 1:29 pm
apart from pluggin in numbers does anyone have another approach to solve this one ?

Thanks.
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by LSB » Sat Aug 30, 2008 3:49 pm
I think B is sufficient:

Question Stem:
ZT < -3

Statement 2:
T < -4

Plug into Q-Stem:
-4Z < -3
Z > 12

Hence Z cannot be < 4 --> Suff

Statment 1 is insuff since we have no info on T.

Answer B. Correct me if Im wrong
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by parallel_chase » Sat Aug 30, 2008 4:05 pm
LSB wrote:
Plug into Q-Stem:
-4Z < -3
Z > 12
-4Z < -3

Z > -3/-4

Z > 3/4 not Z > 12
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