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PS: must be a multiple of 25

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PS: must be a multiple of 25 [#permalink] New post 30 Oct 2006, 19:20
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Please explain the answer.
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 [#permalink] New post 30 Oct 2006, 20:54
It must be p^2q^2.

Since p^2q is a multiple of 5, one of p and q must be 5.
So if p=5 the answer will be p^2. But this may not be always true.
So irrespective of whether p=5 or q= 5, p^2q^2 will be a multiple of 25, which is always true.
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Averages Accelerated:Guide to solve Averages Quickly(with 10 practice problems)

  [#permalink] 30 Oct 2006, 20:54
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