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Data Sufficiency Question

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above720
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Data Sufficiency Question [#permalink] New post   03 May 2006, 19:30
Can someone help me solve this data sufficiency question?

Q: Is X < Y ?

1) Z^2 < Y
2) X < Z

Thanks.



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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 19:42
shoot.. E

consider fractions!!!!!!!!!!!!

aargggggggggghhhhhhh
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above720
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 20:00
If anyone has the answer, please also walk through the logic of obtaining it. Thanks a lot.
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 20:02
1. Not Sufficient

2. Not Sufficient

Together

IF x<z
and z^2 < y

Then x<y for z=2 (for eg.) but not true for z=1/2

Thus E
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 20:36
above720 wrote:
Is X < Y ?
1) Z^2 < Y
2) X < Z


from i, we only know that y is +ve.
from ii, if z = 0.9, y = 0.85 and x = 0.89, not suff...
if z >1, yes.

from both, not suff...so E.
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 21:12
Yes both insufficient
Insufficient when combined


Definite E!
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 21:45
GR8 explanation Pro
agree with E
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Re: Data Sufficiency Question [#permalink] New post   03 May 2006, 21:56
St1:
Insufficient. We have no information about x.

St2:
Insufficient. We have no information about y.

Using St1 and St2

X^2 < z^2
x^2 < Y

If x = 0.9, y = 0.8, then x^2 < y and x > y. If x = 1 and y = 2, then x^2 < y and x < y. Insufficient.

Ans E
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Re: Data Sufficiency Question [#permalink] New post   04 May 2006, 06:37
Agree it is E :wink:
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Re: Data Sufficiency Question [#permalink] New post   04 May 2006, 06:55
E . I almost thought of C then remembered fractions!!!!
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Re: Data Sufficiency Question [#permalink] New post   04 May 2006, 07:42
grrrr I fell into the trap, must consider fractions ie. let z=1/2 then z^2=1/4.

I think i need to make a list of things to consider when doing inequalities:
Signs, Fractional Values, Absolute Values, Square (hides the sign). What else?



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Re: Data Sufficiency Question [#permalink]
04 May 2006, 07:42
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