Permutation questions- urgent help needed

farouz
Thu, 24 Jan 2013 17:30:01 +0000

Ohhhhh okay i got it now.
Could anyone solve this for me?

17.If p. r. and s are three different prime numbers greater than 2, and n = p * r * s, how many positive factors, including 1 and n. does n have?

I assumed that its 5.
I dont have the right answer though.
It was from a random thread on internet but this question ad appeared on some old previous real tests like starting from 2003 or so.