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Modulus

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Modulus

by getso » Sat Apr 24, 2010 8:58 am
Is modulus of X=Modulus of Y??
(1) x - y = 6
(2) x + y = 0

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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Source: — Data Sufficiency |
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by thephoenix » Sat Apr 24, 2010 9:10 am
IMO B
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by iamseer » Sat Apr 24, 2010 9:13 am
From A
X=6+Y
NOT Sufficient

From B
X=-Y
Statement B is sufficient

Answer B

basically modulus is distance from origin. Therefore a number and its negative counterpart will always have some absolute value
"Choose to chance the rapids and dance the tides"
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by getso » Sat Apr 24, 2010 9:34 am
I guess the answers given in the source are wrong..

I too went with B but surprised when the answer was marked as A.
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by iamseer » Sat Apr 24, 2010 10:10 am
Its best to stick to official material and material from best GMAT tutoring companies instead of killing time on material with wrong questions or unreliable answers.

cheers!!
"Choose to chance the rapids and dance the tides"
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