Revise Highest Common Factor and Lowest Common Multiple, HCF and LCM using prime factors and how to use Venn diagrams in this Bitesize guide.

Then we create a Venn diagram for the factors: Once we have the Venn diagram, finding the LCM is simply a matter of multiplying all the numbers in the Venn diagram together: LCM = 3 × 2 × 3 × 5 ...