LCM & GCF

Least Common Multiple (LCM)

of two or more numbers is the smallest number, other than zero, that is a multiple of each number.

Greatest Common Factor (GCF)

of two or more numbers is the largest number that is a factor of each number.

How to Calculate Them

There are a few different methods we can use to find both the LCM and the GFC. We will go over each. Pick the way that makes most sense to you – in the end you should get the same answer regardless of which one you choose.