What is the value of the positive integer m? : GMAT Data Sufficiency (DS)
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# What is the value of the positive integer m?

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Joined: 27 Feb 2012
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What is the value of the positive integer m? [#permalink]

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28 Nov 2012, 21:22
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5% (low)

Question Stats:

74% (01:29) correct 26% (00:32) wrong based on 70 sessions

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What is the value of the positive integer m?

(1) m^2 = 2m

(2) m is even
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Re: What is the value of the positive integer m? [#permalink]

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28 Nov 2012, 22:05
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1) m can be 0 or 2. But m is given as a positive integer. So m=2. Sufficient.

2)m can be any positive even number. Insufficient.

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Re: What is the value of the positive integer m? [#permalink]

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29 Nov 2012, 01:56
What is the value of the positive integer m?

(1) m^2 = 2m --> m^2-2m=0 --> m(m-2)=0 --> m=0 or m=2. Since given that m is positive, then m cannot be zero, thus m=2. Sufficient.

(2) m is even --> clearly insufficient, m can be any positive even number.

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Re: What is the value of the positive integer m?   [#permalink] 29 Nov 2012, 01:56
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