Question

Let n(s) =x is a positive multiple of 3 less than 100 and p= x is a prime no. Less than 20 . Then find n(s)+n(p)

Answer 1

The function f(n) = the number of factors of n. If p and q are positive integers and f(pq) = 4, what is the value of p? 

(1) p + q is an odd integer 

(2) q is less than p