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If Z^^n = 1 , what is value of z? (1) n is a nonzero integer

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Manager
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If Z^^n = 1 , what is value of z? (1) n is a nonzero integer  [#permalink]

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New post 16 Feb 2009, 21:12
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If Z^^n = 1 , what is value of z?
(1) n is a nonzero integer
(2) z > 0

--== Message from GMAT Club Team ==--

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Senior Manager
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Joined: 08 Jan 2009
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Re: DS - Number properties - Is it one?  [#permalink]

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New post 16 Feb 2009, 21:47
given Z^n = 1

stmt 1 : n is non integer so n < 0 or n >0

so z = 1 and n= 1 then z^n = 1
or z = -1 and n= 2 then z^n =1 .so Insufficient

Stmt 2:
z > 0 then for z any value and n=0 then Z^n =1.So in sufficient.

Combining both Z>0 and n is a non intger then yes Z =1 .

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Name: Ronak Amin
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Re: DS - Number properties - Is it one?  [#permalink]

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New post 22 Feb 2009, 03:44
IMO it should be B.
Here possible values of Z are -1,0,1.

1) n is non-zero, we dont know anything about Z. - not sufficient
2) Z>0. which means Z=1. 1^n is always 1. - sufficient.

What is OA?

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS - Number properties - Is it one? &nbs [#permalink] 22 Feb 2009, 03:44
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If Z^^n = 1 , what is value of z? (1) n is a nonzero integer

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