What is the LCM of 22 55 and 60?

Answer 1

Take the top two first.
LCM is the product divided by the GCF
55 factors to [5 11]
60 factors to [2 2 3 5]
common factor is 5, so LCM is 55 * 60 / 5 = 660

Now, since 22 factors to [2 11] and both of them are in the above factors, 22 is a factor of 660 as well (22*30), so 660 is the answer. ■