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Here is another one from GMATPREP that i thought i got

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Here is another one from GMATPREP that i thought i got [#permalink] New post 02 May 2007, 10:52
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Here is another one from GMATPREP that i thought i got correct but my answer was different from OA.

If r and s are integers and rs+r is odd, which of the following must be even?

A) r
B)s
C) r+s
D) rs-r
E) r^2+s

My answer was A but the OA is B. I was kind of surprised by this.
Please help me.

Lavanya
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 [#permalink] New post 02 May 2007, 11:18
Answer should be B

Its given that rs+r is odd i.e r(s+1) is odd which is possible only and only when s= even
  [#permalink] 02 May 2007, 11:18
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Here is another one from GMATPREP that i thought i got

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