Sometimes you are given numbers expressed as a product of prime factors. For example, 8 = 2 3 and 90 = 2 × 3 2 × 5. If you want to find the LCM and HCF in an exam, we can use prime factor form ...

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