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d/s variables

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Manager
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Joined: 04 Feb 2011
Posts: 63
Location: US
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Kudos [?]: 72 [0], given: 42

d/s variables [#permalink]

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New post 08 Mar 2011, 23:07
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100% (01:29) correct 0% (00:00) wrong based on 5 sessions

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If n + k = m, what is the value of k?
(1) n = 10
(2) m + 10 = n
[Reveal] Spoiler: OA
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Manager
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Joined: 14 Feb 2011
Posts: 196
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Kudos [?]: 101 [1] , given: 3

Re: d/s variables [#permalink]

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New post 08 Mar 2011, 23:13
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Lolaergasheva wrote:
If n + k = m, what is the value of k?
(1) n = 10
(2) m + 10 = n


Statement 1, n=10 gives us 10+k = m, so k can be anything depending on value of m, so insufficient

Statement 2, m+10=n when put in the stem gives us m+10+k=m or k+10 = 0 or K=-10. So, sufficient.

Answer B
Re: d/s variables   [#permalink] 08 Mar 2011, 23:13
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