GCSE Maths HCF and LCM Revision in Worthing
HCF and LCM questions test factors, multiples and sometimes prime factorisation. Students need to decide whether the question is asking for a shared factor or a shared multiple.
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Key skills
- Listing factors and multiples
- Finding highest common factor
- Finding lowest common multiple
- Using prime factors to solve harder questions
Exam tip: HCF is about the biggest shared factor. LCM is about the smallest shared multiple.
Common mistake: A common mistake is finding the HCF when the question asks for the LCM, especially in word problems.
Video explanation
A short Worthing Maths Tutor video explanation for GCSE Maths HCF and LCM can be embedded here later to improve student engagement and time on page.