Or try plugging in numbers:
We need 3 different prime numbers, so try {2,3,5}
2*3*5=30
Find the factors of 30 other than 1 and 30
3*10 (that's two)
2*15 (four)
6*5 (six)
Answer is A
We need 3 different prime numbers, so try {2,3,5}
2*3*5=30
Find the factors of 30 other than 1 and 30
3*10 (that's two)
2*15 (four)
6*5 (six)
Answer is A
