LCM and GCF of 5 15 20

In this video, I find the LCM or lowest common multiple of the numbers 5,15, and 20. The LCM is sometimes also called the least common multiple. The LCM of five, fifteen and twenty equals sixty. I use a factor tree to find the LCM In addition, I find the GCF or greatest common factor of 5,15, and 20. The greatest common factor of 5,15, and 20 equals 5