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OG 11

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by moneyman » Sat Aug 18, 2007 8:02 am
If v and w are different integers , does v=0??

(1) vw=v^2
(2)w=2
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by erdnah » Sat Aug 18, 2007 9:51 am
(2) alone is not sufficient

(1) alone is sufficient
vw-v^2=0
v(w-v)=0
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by bingojohn » Mon Aug 20, 2007 6:29 am
erdnah wrote:(2) alone is not sufficient

(1) alone is sufficient
vw-v^2=0
v(w-v)=0
How is (1) sufficient... the equation
v(w-v) = 0 implies
EITHER v = 0
OR w - v = 0 => w = v

You can't tell for certain if v = 0, hence not sufficient.

Combined, not sufficient.

Hence my answer is [E].

What is OA?
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by beny » Mon Aug 20, 2007 7:11 am
It says that v and w are different.
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by bingojohn » Mon Aug 20, 2007 8:18 am
beny wrote:It says that v and w are different.
You are right, my bad... (read, read, read ... )
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