n=p^2q
n is a multiple of 5
therefore either p is a multiple 5 or q is a multiple of 5
if p is a multiple 5, p^2 will be definitely a multiple of 25
if q is a multiple of 5, q^2 will be definitely a multiple of 25
therefore, p^2* q^2 will we have at least 1 multiple of 25.
mutiple of 5
This topic has expert replies
Source: Beat The GMAT — Problem Solving |
-
parallel_chase
- Legendary Member
- Posts: 1153
- Joined: Wed Jun 20, 2007 6:21 am
- Thanked: 146 times
- Followed by:2 members
