# math

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What is the greatest common factor of 18, 30, and 45? I come up with 3 as the greatest common factor am I right?

• math -

Yes. You're right.

• math -

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

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