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## GMAT PREP QUES

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

#### GMAT PREP QUES

Wed Mar 07, 2007 8:50 am
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.

gabriel Legendary Member
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
51
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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