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Finding LCM and HCF from prime factors

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 ...
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Highest common factor and lowest common multiple

Explore our updated revision resources for GCSE Maths: HCF and LCM using prime factors, with step-by-step slideshows, quizzes, practice exam questions, and more! Explore our updated revision resources ...