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M04#9 - Not the probability Q, but the value of X Q

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Senior Manager
Senior Manager
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Joined: 29 Sep 2009
Posts: 391

Kudos [?]: 41 [0], given: 5

GMAT 1: 690 Q47 V38
M04#9 - Not the probability Q, but the value of X Q [#permalink]

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New post 31 Mar 2010, 20:00
What is the value of \(X\) ?

1. \(X!\) is odd
2. \(X\) is even

S1: 0!=1, 1!=1 not sufficient
S2: 2,4,6,8,,,,
S1 and S2 are mutually exclusive sets, in other words statements S1 and S2 are conflicting.

Last edited by vicksikand on 31 Mar 2010, 20:35, edited 1 time in total.

Kudos [?]: 41 [0], given: 5

Manager
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Joined: 02 Aug 2009
Posts: 107

Kudos [?]: 25 [0], given: 1

Re: M04#9 - Not the probability Q, but the value of X Q [#permalink]

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New post 31 Mar 2010, 20:13
X! is odd and the two numbers you pulled 0 and 1 satisfy that.

However in statement 2 X (not X!) is said to be even so 0 is even while 1 is odd

so 0 satisfies this and the statements do not contradict.

Kudos [?]: 25 [0], given: 1

Senior Manager
Senior Manager
User avatar
Joined: 29 Sep 2009
Posts: 391

Kudos [?]: 41 [0], given: 5

GMAT 1: 690 Q47 V38
Re: M04#9 - Not the probability Q, but the value of X Q [#permalink]

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New post 31 Mar 2010, 20:35
Just slipped @ 0 is an even integer. For the record, I knew S2 was just X and not X! , I should accounted for 0 in addition to the other even numbers (2,4,6,8,....)

Kudos [?]: 41 [0], given: 5

Re: M04#9 - Not the probability Q, but the value of X Q   [#permalink] 31 Mar 2010, 20:35
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M04#9 - Not the probability Q, but the value of X Q

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