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GMAT prep : value of v

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by sukrant26 » Wed Jun 25, 2008 7:14 pm
My understanding was :

vw=v^2
v^2-vw=0
v(v-w)=0

hence v can be either 0 or w.

Then why Statement 1 is sufficient to decide whether v=0 or not?

Please help
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Source: — Data Sufficiency |
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by anshul265 » Wed Jun 25, 2008 8:02 pm
The question says if v and w are different integers!
Which means v is not equal to w.
So the only possible value of v is 0.

Ans A.
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by mlane25269 » Wed Jun 25, 2008 9:28 pm
Just to elaborate on what anshul265 said...

If V=0, we can assume that, since w is anything except 0, V^2 will always be equal to 0 because 0^2 is the same as zero, regardless of the value of w since any number * 0 is always 0.

Does that makes sense
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by Carol » Mon Jun 30, 2008 12:50 pm
sukrant26 - I think your approach is more logical.

just because v and w are different integers, v doesn't have to be 0. v can be 1 and w 3.

any more thoughts?
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