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Math Expert
Joined: 02 Sep 2009
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46% (00:39) correct 54% (00:29) wrong based on 184 sessions
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Re M0410
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16 Sep 2014, 00:22



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M0410
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Updated on: 15 Jul 2016, 02:35
got it



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Re: M0410
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15 Jul 2016, 02:15



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is zero evenly divisible by 3 or by 7 ? Also please let me know the remainder, if any.



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Re: M0410
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26 May 2017, 08:46



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Re: M0410
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30 May 2017, 09:20
Very good question, one needs to remember that 0! = 1 and 1! = 1.
Statement 1: x! is odd, only two numbers have odd factorial that are 0 and 1 as stated above. Insufficient.
Statement 2: x is even, there can be infinite possibilities. Insufficient.
Combine both statement, only 0 satisfies the conditions because 0 is even and its factorial is odd.
Option C is correct.



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Re: M0410
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28 Sep 2017, 08:53
I too fell for the mistake of forgetting about 0! Actually, I thought of it but did not think 0! existed and didn't know it was = 1.
Anyway, my actual question is about the structure of DS questions. While doing the problem, I thought Statement 1 was sufficient so I eliminated the possibility of the answer being choices B,C,E.
While analyzing statement 2, while it's obviously insufficient the statement made me double think if Statement 1 was sufficient given that x = 1 is not even. I know you should think of each statement individually, but in all DS questions I can think of, if one or more of the statements are sufficient then the two statements always confirm each other. In this scenario it didn't make sense to me that if Statement 1 were indeed sufficient, they wouldn't contradict the answer in Statement two. Does this actually hold true on the GMAT? In the future, if I'm in a situation like this where I see Statement 2 contradicting statement 1 (which I incorrectly thought was sufficient) can I use this as a sign to reevaluate the first statement?
Thank you!



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Re: M0410
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28 Sep 2017, 08:58
Gmatfrog3 wrote: I too fell for the mistake of forgetting about 0! Actually, I thought of it but did not think 0! existed and didn't know it was = 1.
Anyway, my actual question is about the structure of DS questions. While doing the problem, I thought Statement 1 was sufficient so I eliminated the possibility of the answer being choices B,C,E.
While analyzing statement 2, while it's obviously insufficient the statement made me double think if Statement 1 was sufficient given that x = 1 is not even. I know you should think of each statement individually, but in all DS questions I can think of, if one or more of the statements are sufficient then the two statements always confirm each other. In this scenario it didn't make sense to me that if Statement 1 were indeed sufficient, they wouldn't contradict the answer in Statement two. Does this actually hold true on the GMAT? In the future, if I'm in a situation like this where I see Statement 2 contradicting statement 1 (which I incorrectly thought was sufficient) can I use this as a sign to reevaluate the first statement?
Thank you! Yes. On the GMAT, two data sufficiency statements always provide TRUE information and these statements NEVER contradict each other or the stem.
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