#### Answer

60

#### Work Step by Step

The least common multiple (LCM) of a group of numbers is the smallest number that is divisible by all of the numbers in the group. In order to find the LCM of 4 and 15, we can write the multiples of both numbers and find the first multiple that both numbers have in common.
4- 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60
15 - 15, 30, 45, 60
Therefore, the LCM of 4 and 15 is 60.