How many factors of 330 are odd numbers greater than 1?

A. 3
B. 4
C. 5
D. 6
E. 7

The OA is E.

Primes factors of 330 are 2^1, 3^1, 5^1, and 11^1.

Total divisors = (power if a prime factor+1)

Total number of odd factors (3, 5, 11) = (1+1)(1+1)(1+1)=8

Since we need odd divisors other than 1 => 8-1 = 7 odd divisors.

Please, can anyone explain another way to solve this PS question? Thanks.