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# What is the value of X? 1. X! is odd. 2. X is even

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SVP
Joined: 29 Aug 2007
Posts: 2453
What is the value of X? 1. X! is odd. 2. X is even [#permalink]

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13 Dec 2008, 23:37
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What is the value of X?

1. X! is odd.
2. X is even.

--== 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.

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Intern
Joined: 05 Dec 2008
Posts: 18
Re: DS: Even or Odd [#permalink]

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14 Dec 2008, 01:32
I go for A.

1) only 1! is odd (x! = 1*2*...*x , if x>1, X! is always the factor of 2 which always be even)--> suff
2) x is any even --> not suff
Manager
Joined: 23 Nov 2008
Posts: 79
Re: DS: Even or Odd [#permalink]

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14 Dec 2008, 03:28
0! Is odd as well
so answer should be C IMO
Manager
Joined: 10 Aug 2008
Posts: 73
Re: DS: Even or Odd [#permalink]

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14 Dec 2008, 06:10
By fst x! is ODD possible value of x is 0 or 1
But by 2nd x is even .

So combining two the value of x is 0. Hence the answer!
Intern
Joined: 05 Dec 2008
Posts: 18
Re: DS: Even or Odd [#permalink]

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15 Dec 2008, 21:44
I've just returned to this post. I confirm that 0 is even not odd, pls see from this below statement (from wikipedia)
An even number is an integer that is "evenly divisible" by 2, i.e., divisible by 2 without remainder Examples of even numbers are −4, 8, 0, and 42.
VP
Joined: 18 May 2008
Posts: 1203
Re: DS: Even or Odd [#permalink]

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15 Dec 2008, 22:26
Stmnt 1: X can be 0 or 1 Insuff
Stmnt 2: X cn be any integer greater than 1 Insuff
Combining X = 0 Suff
Hence ans is C

GMAT TIGER wrote:
What is the value of X?

1. X! is odd.
2. X is even.
Intern
Joined: 05 Dec 2008
Posts: 18
Re: DS: Even or Odd [#permalink]

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15 Dec 2008, 23:04
sorry for my misunderstanding. I forgot that 0! is 1. Then C is correct.

--== 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: Even or Odd   [#permalink] 15 Dec 2008, 23:04
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