Asked by A.W.

What is the greatest common factor of 18, 30, and 45? I come up with 3 as the greatest common factor am I right?
Answered by Ms. Sue
Yes. You're right.
Answered by Damon
18 = 3*3*2
30 = 5*3*2
45 = 5*3*3
so
3 is the biggest factor that is in all three.

by the way for the smallest common multiple
we need two 3s and one 2 and one 5
3*3*2*5 = 90 (used to get least common denominator