Save guides, add subjects and pick up where you left off with your BBC account. Refresh your knowledge with these guides on factor trees and writing numbers as a product of prime factors. List the ...

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 to ...