What is the lcm of 7 and 12?

The least common multiple (LCM) of 7 and 12 is 84.

To find the LCM, you can list the multiples of each number and find the smallest number that is a multiple of both 7 and 12. In this case, the multiples of 7 are 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84,... and the multiples of 12 are 12, 24, 36, 48, 60, 72, 84,...

The smallest number that appears in both lists is 84, therefore the LCM of 7 and 12 is 84.