What is the LCM of 11 22 and 12?

Answer 1

The easiest way that I know to do this is to factor each number, drop out the factors that are shared, and multiply the factors that are left.

11 is prime already.

22 = 2 X 11

12 = 2 X 2 X 3

Drop out one of the 11's because it is shared. Drop out a 2 that is shared. What is left is:

11 X 2 X 2 X 3 = 132

Test to make sure it is right.

132 / 11 = 12

132/22 = 6

132/12 = 11

It checks out ok, so give the final answer.

Answer: 132