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varmaskarma
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PostPosted: Thu Aug 21, 2008 6:24 pm    Post subject: GmatPrep - PS Reply with quote
I got a split between A and E which wont go away no matter how much i plugged in. Could someone please explain to me why the OA is E.
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Sunny22uk
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PostPosted: Thu Aug 21, 2008 6:46 pm    Post subject: Re: GmatPrep - PS Reply with quote
varmaskarma wrote:
I got a split between A and E which wont go away no matter how much i plugged in. Could someone please explain to me why the OA is E.

3x/2 is even if you substitute x=4
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sumithshah
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PostPosted: Thu Aug 21, 2008 8:23 pm    Post subject: Reply with quote
Heres a simpler way :

For E :

X is even - so X^2 is even and ((even)^2) / 2 is always even.
Now, 3*even = even and even + 1 is always odd

So no need to substitute.
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varmaskarma
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PostPosted: Thu Aug 21, 2008 8:42 pm    Post subject: Reply with quote
Thanks guys!
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vishubn
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PostPosted: Thu Aug 21, 2008 8:45 pm    Post subject: Reply with quote
It would be of great help if someone plugin or show how each option is elliminated before choosing E

thabks in advance

Vishu
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