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amir_hatef
 Post subject: Answer DS question
PostPosted: Mon Jan 11, 2010 8:52 am 
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Joined: Wed Nov 04, 2009 5:50 am
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Q. If x is an integer, is x odd?

(1) x + (x + 1) + (x + 2) is odd

(2) x2 is even


I say answer should be (E).
Am I right?
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manish
 Post subject: Re: Answer DS question
PostPosted: Thu Jan 21, 2010 8:05 am 
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Joined: Sun Jan 02, 2005 5:13 pm
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Statement 1 is definitely sufficient.

x + x + 1 + x + 2 is odd
i.e., 3x + 3 is odd. So, 3x has to be even. As 3 is odd and x is an integer, x has to be even. Note Zero is an even number too. So, we can conclude that x is not odd. As the question is answered, statement 1 is sufficient.

Statement 2 - if the statement is x^2 is even, then it means that x is even. So, it again answers the question that x is not odd. So sufficient.

If statement 2 is how I have interpreted, then the answer is D else it is A
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