### What is a GCF and LCM?

The GCF, or greatest common factor, is the largest number that will divide evenly with no remainder into all the members of a given set of numbers. The LCM, or least common multiple, is the smallest number that all the members of a given set of numbers will divide into evenly with no remainder. Factors go into numbers, numbers go into multiples. The GCF, or greatest common factor, is the largest number that will divide…