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If a and b are integers and a is not equal to b, is ab >

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Director
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Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
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If a and b are integers and a is not equal to b, is ab > [#permalink]

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New post 02 Aug 2010, 02:24
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A
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Difficulty:

  55% (hard)

Question Stats:

77% (00:45) correct 23% (00:19) wrong based on 29 sessions

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If a and b are integers and a is not equal to b, is ab > 0?

(1) a^b > 0
(2) a^b is a non-zero integer

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-a-and-b-a ... 01661.html
[Reveal] Spoiler: OA
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink]

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New post 02 Aug 2010, 02:46
Hi,

Statement 1 is not sufficient:
Example
a=2, b=4 a^b>0 and ab>0
a=-2, b=4 a^b>0 and ab<0

Statement 2 again is not sufficient since no information is given (just that a^b is a non zero integer).

Taking both statements together, again is not sufficient.

regards,
Jack
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink]

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New post 02 Aug 2010, 05:04
Its E for me as well...
Director
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Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 26 Nov 2009
Posts: 951
Location: Singapore
Concentration: General Management, Finance
Schools: Chicago Booth - Class of 2015
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink]

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New post 02 Aug 2010, 06:38
Awesome ! :-D

jakolik wrote:
Hi,

Statement 1 is not sufficient:
Example
a=2, b=4 a^b>0 and ab>0
a=-2, b=4 a^b>0 and ab<0

Statement 2 again is not sufficient since no information is given (just that a^b is a non zero integer).

Taking both statements together, again is not sufficient.

regards,
Jack
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink]

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New post 14 Aug 2017, 01:11
nusmavrik wrote:
If a and b are integers and a is not equal to b, is ab > 0?

(1) a^b > 0
(2) a^b is a non-zero integer



Is \(ab>0\)? Question basically asks whether \(a\) and \(b\) are both positive or both negative.

(1) \(a^b>0\) --> both \(a\) and \(b\) could be positive as well as \(a\) could be positive and \(b\) negative. Not sufficient.

(2) a^b is a non-zero integer --> if \(a=1\) and \(b=-1\) answer would be NO but if \(a=1\) and \(b=2\) answer would be YES. Not sufficient.

(1)+(2) Example from (2) is still valid. Not sufficient.

Answer: E.

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-a-and-b-a ... 01661.html
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Re: If a and b are integers and a is not equal to b, is ab >   [#permalink] 14 Aug 2017, 01:11
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