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GMAT PREP QUES

This topic has 1 member reply
yvonne12 Master | Next Rank: 500 Posts Default Avatar
Joined
07 Feb 2007
Posted:
144 messages

GMAT PREP QUES

Post Wed Mar 07, 2007 8:50 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If N is a multiple of 5 on n=p^2q, where p and q are prime numbers, which must be a multiple of 25?

    p^2
    q^2
    pq
    p^2 q^2
    p^3 q

    please explain this to me.

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    gabriel Legendary Member
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    Post Thu Mar 08, 2007 3:17 am
    yvonne12 wrote:
    If N is a multiple of 5 on n=p^2q, where p and q are prime numbers, which must be a multiple of 25?

    p^2
    q^2
    pq
    p^2 q^2
    p^3 q

    please explain this to me.
    given that N is a multiple of 5.... so either p^2 is a multiple of 5 or q is a multiple of 5.... but since it is given that p and q are integers.... therefore q is a multiple of 5...... therefore out of the given choices p^2 q^2 is a multiple of 25... the answer is d

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