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Which of the following lines in the xy-plane does not

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Which of the following lines in the xy-plane does not [#permalink] New post 31 Mar 2012, 05:43
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Which of the following lines in the xy-plane does not contain any point with integers as both coordinates?

A. y=x
B. y=x+1/2
C. Y=x+5
D. y=x*1/2
E. y=x/2 +5
[Reveal] Spoiler: OA

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Re: Which of the following lines in the xy-plane does not [#permalink] New post 31 Mar 2012, 05:47
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mymbadreamz wrote:
Which of the following lines in the xy-plane does not contain any point with integers as both coordinates?

A. y=x
B. y=x+1/2
C. Y=x+5
D. y=x*1/2
E. y=x/2 +5


The answer is y=x+1/2, since for any integer value of x, y becomes integer and a half: .

Answer: B.
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Re: Which of the following lines in the xy-plane does not   [#permalink] 31 Mar 2012, 05:47
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