Multiple of 25

[Viper83]

If n is a multiple of 5 and (n=p^2)(q), where p and q are prime numbers, which of the following must be a multiple of 25?

a. p^2
b. q^2
c. pq
d. (p^2)(q^2)
e. (p^3)(q)

what is the best approach to solving this kind of a problem?

d[/list]

[Rahul@gurome]

If n is a multiple of 5 and (n=p^2)(q), where p and q are prime numbers, which of the following must be a multiple of 25?

a. p^2
b. q^2
c. pq
d. (p^2)(q^2)
e. (p^3)(q)

Refer to this post : https://www.beatthegmat.com/ps-problem-s ... tml#322564