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must be true question OG10

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must be true question OG10 [#permalink] New post 27 Sep 2010, 23:04
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If s, u, v are positive integers and 2s=2u + 2v, which of the following must be true?

1 . s=u
11. u is not equal to v
111. s>v

Answer : (111) only

please explain the logic with steps to evaluate
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Re: must be true question OG10 [#permalink] New post 27 Sep 2010, 23:14
V is positive so v>0 and s=u+v so s>u

Nothing stops this from being true or false

U is positive so u>0 and s=u+v so s>v



Hence III only
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Re: must be true question OG10 [#permalink] New post 27 Sep 2010, 23:15
s=u+v and they are all posittive interger => s>u, s>v
Re: must be true question OG10   [#permalink] 27 Sep 2010, 23:15
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