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

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If a and b are integers and a is not equal to b, is ab > [#permalink] New post 25 Sep 2010, 03:19
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E

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  45% (medium)

Question Stats:

66% (01:58) correct 34% (01:14) wrong based on 47 sessions
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
[Reveal] Spoiler: OA

Last edited by Bunuel on 03 Jan 2014, 05:34, edited 1 time in total.
Edited the OA.
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Re: The Power of Absolutes - Manhattan Challenge Problem [#permalink] New post 25 Sep 2010, 03:35
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sachinrelan 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

I got the answer E is the answer Correct as i dnt have the official answer to this question


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.
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Re: The Power of Absolutes - Manhattan Challenge Problem [#permalink] New post 25 Sep 2010, 03:48
Bunuel wrote:
sachinrelan 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

I got the answer E is the answer Correct as i dnt have the official answer to this question


Is ab>0? Question basically asks are a and b 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.



Thanks for your explanation !! :)
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink] New post 03 Jan 2014, 05:32
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Kindly update the answer in spoiler from C to E.
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink] New post 03 Jan 2014, 05:35
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Re: If a and b are integers and a is not equal to b, is ab > [#permalink] New post 03 Jan 2014, 11:04
sachinrelan 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



very nice question !!

unfortunately i chose option C. :(
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Re: If a and b are integers and a is not equal to b, is ab >   [#permalink] 03 Jan 2014, 11:04
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