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V and W

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Junior | Next Rank: 30 Posts
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by ravikirancheni » Thu Jan 15, 2009 6:11 am
Looked quite simple....but was bamboozled getting it wrong !

1. says v(v-w) = 0 i,e either V=0, or V=w
INSUFF

2.W = 2
INSUFF

Together v = 0 or V= 2 Not solid

So chose E
Am i wrong ?
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Re: V and W

by mental » Thu Jan 15, 2009 6:21 am
ravikirancheni wrote:Looked quite simple....but was bamboozled getting it wrong !

1. says v(v-w) = 0 i,e either V=0, or V=w
INSUFF

2.W = 2
INSUFF

Together v = 0 or V= 2 Not solid

So chose E
Am i wrong ?
The question says IF v and w are different integers

that makes 1 sufficient as v cannot be equal to w
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by ravikirancheni » Thu Jan 15, 2009 6:27 am
I think i was drunk when i took this Prep
and repercussions are still continuing.

Thanks Mental !
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Re: V and W

by Brent@GMATPrepNow » Sun Jul 25, 2021 6:34 am
Given: v and w are different integers

Target question: Does v = 0?

Statement 1: vw = v²
Subtract v² from both sides of the equation: vw - v² = 0
Factor: v(w - v) = 0
So, EITHER v = 0 OR w - v = 0
Important: If w - v = 0, then that means w = v, and the question tells us that v and w are different integers.
This means w - v cannot equal 0, which means v = 0
So, the answer to the target question is YES, v = 0
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2: w = 2
Since statement to provides no information about v, we can’t answer the target question with certainty
Statement 2 is NOT SUFFICIENT

Answer: A

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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