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 ...

3): This interactive activity will help you understand how to calculate the HCF and LCM of a pair of numbers by placing their prime factors in a Venn diagram. Practise what you've learned about ...