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# Data Sufficiency Question

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Manager
Joined: 05 May 2005
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Data Sufficiency Question [#permalink]  03 May 2006, 18:30
Can someone help me solve this data sufficiency question?

Q: Is X < Y ?

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

Thanks.
Director
Joined: 04 Jan 2006
Posts: 926
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shoot.. E

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

aargggggggggghhhhhhh
Manager
Joined: 05 May 2005
Posts: 81
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Kudos [?]: 18 [0], given: 0

If anyone has the answer, please also walk through the logic of obtaining it. Thanks a lot.
Director
Joined: 16 Aug 2005
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Location: France
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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
VP
Joined: 29 Dec 2005
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Re: Data Sufficiency Question [#permalink]  03 May 2006, 19:36
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.
Manager
Joined: 17 Jan 2006
Posts: 92
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Yes both insufficient
Insufficient when combined

Definite E!
Director
Joined: 09 Oct 2005
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GR8 explanation Pro
agree with E
_________________

IE IMBA 2010

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5078
Location: Singapore
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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
Manager
Joined: 27 Mar 2006
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Agree it is E
Intern
Joined: 17 Feb 2006
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E . I almost thought of C then remembered fractions!!!!
Manager
Joined: 14 Mar 2006
Posts: 209
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Kudos [?]: 4 [0], given: 0

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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