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# M04 #24

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Joined: 18 Jan 2010
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04 May 2010, 16:16
Is x=0?
1. xy=x
2. x+y=y

Statement (1) by itself is insufficient. implies either x=0 or y=1 .

Statement (2) by itself is sufficient. S2 implies that x=0 .

I see why statement 2 is sufficient, but why statement 1 is not sufficient. Doesn't st.1 tells that x=0, so sufficient?.
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04 May 2010, 16:25
gmat00 wrote:
Is x=0?
1. xy=x
2. x+y=y

Statement (1) by itself is insufficient. implies either x=0 or y=1 .

Statement (2) by itself is sufficient. S2 implies that x=0 .

I see why statement 2 is sufficient, but why statement 1 is not sufficient. Doesn't st.1 tells that x=0, so sufficient?.

x can be any number as long as y = 1
Re: M04 #24   [#permalink] 04 May 2010, 16:25
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# M04 #24

Moderator: Bunuel

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