T<span>he highest number that divides exactly into two or more numbers. When we find all the </span>factors<span> of two or more numbers, and some </span>factorsare the same ("common<span>"), then the largest of those </span>common factors<span> is the Greatest</span>Common Factor<span>. Abbreviated "GCF".</span>
A common factor is a factor that both numbers have in common, a factor is a number that's multiplied by another number to make the product, and a common factor is a shared factor. 12 and 6 both have common factors of 2, 3 and 6, 2x6=12, 2x3=6 3x4=12 and 6x1=6
