Question

How many positive integers less than 500 are the product of exactly two distinct (meaning different) primes, each of which is greater than 10?

Answer 1

i think the number of such integers whose smaller prime equals 11 is 8.
With smaller prime = 13 is 6, with smaller prime = 17 is 3, and finally, with smaller prime = 19 is 1
For a total of 8+6+3+1 = 18.