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# Which of the following cannot be the greatest common

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Director
Joined: 10 Feb 2006
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Which of the following cannot be the greatest common [#permalink]

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18 May 2007, 05:49
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Which of the following cannot be the greatest common divisior of two positive integers x and y?

A. 1
B. x
C. y
D. x - y
E. x + y
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18 May 2007, 05:51
(E) for me

x + y > x as y > 0
<=> x/(x+y) < 1

and so is y/(x+y) < 1
18 May 2007, 05:51
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