what is the lcm of 15 and 25

The least common multiple (LCM) of 15 and 25 is 75.

To find the LCM, you can use the prime factorization method or list the multiples of each number until you find a common multiple. In this case, the multiples of 15 are 15, 30, 45, 60, 75, ... and the multiples of 25 are 25, 50, 75, ... The first common multiple is 75, so that is the LCM of 15 and 25.