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# divisibility

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Joined: 05 Mar 2008
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divisibility [#permalink]  11 Dec 2009, 07:39
If a question states (x+y)^2 is divisible by 9, is 0 considered divisible by 9

In the case above x + y = 0

Is that possible?
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Joined: 11 Dec 2009
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Re: divisibility [#permalink]  15 Dec 2009, 22:53
0 has infinite factors so I think 0 is divisible by 9, but 9 divided by 0 is of course undefined.
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Re: divisibility   [#permalink] 15 Dec 2009, 22:53
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