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# If k is a positive integer, is k the square of an integer?

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Intern
Joined: 26 Jan 2008
Posts: 26
If k is a positive integer, is k the square of an integer? [#permalink]

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07 Sep 2008, 06:54
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If k is a positive integer, is k the square of an integer?
a. k is divisible by 4
b. k is divisible by exactly 4 different prime numbers
SVP
Joined: 29 Aug 2007
Posts: 2467

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07 Sep 2008, 08:02
ttwang56 wrote:
If k is a positive integer, is k the square of an integer?

a. k is divisible by 4
b. k is divisible by exactly 4 different prime numbers

1: k could be 0 or 4 or 8 or 12. nsf.
2: k could be 2x3x5x7 or 2x2x3x3x3x5x3x7. nsf.

togather k could be again 2x2x3x5x7 or 2x2x3x3x3x5x3x7. nsf.

so //E//
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Re: DS- integer question   [#permalink] 07 Sep 2008, 08:02
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