A common factor is a whole number that is a factor of two or more nonzero whole numbers. The greatest of the common factors is the greatest common factor (GCF).

Relatively Prime: Two or more numbers are relatively prime if their greatest common factor is 1.

Monomials and the GCF: You can find the greatest common factor of two or more monomials by factoring each monomial.

A multiple of a whole number is the product of the number and any nonzero whole number. A multiple that is shared by two or more numbers is a common multiple.

Find out more about GCF and LCM by reading the explanation below.


Practice:  Answer the following exercises about GCF and LCM.

GCF and LCM 1

GCF and LCM 2

GCF and LCM 3