What is the LCM of 3, 5, 15, 16?
For LCM problems, I like to do a prime factorization first:
And now the LCM will have all the primes listed.
So - we have a 3 from the 3. We have a 5 from the 5. The 3 and 5 of the 15 are already listed, so we can move on to the 16 which has four 2s. So the LCM is: