HCF & LCM

Here we have a collection of videos to help GCSE Maths students learn how to find the highest common factor (HCF) and lowest common multiple (LCM).

We also have a Highest Common Factor Calculator and a Least Common Multiple Calculator. Use them to check your answers.

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More GCSE Math Lessons

HCF & LCM Worksheets

Fraction Worksheets

Factor and Fraction Games



Product of prime factors, factor trees, HCF, LCM, GCF GCSE maths



HCF and LCM
Finding the highest common factor and lowest common multiple





Watch this GCSE maths revision lesson on Highest Common Factor (HCF) and Lowest Common Multiple (LCM)



HCF and LCM part 1 of 2





HCF and LCM part 2 of 2



Using a venn diagram method to find LCM and HCF



The following Highest Common Factor Calculator will help you find the HCF of two numbers. It also shows the prime factorization.



The following Least Common Multiple Calculator will help you find the LCM of two numbers. It also shows the prime factorization.







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