The highest common factor is called the greatest common factor (GCF).
The factors of each number is listed below.
6:1×6,2×3; Factors of 6 are 1,2,3,6
12:1×12,2×6,3×4; Factors of 12 are:1,2,3,4,6,12
The GCF is the factor that is the largest factor common to both: 6
