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GCSE Maths

Number

HCF, LCM and Product of Primes

HCF, LCM and Product of Primes

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Level 4–5
Foundation & Higher
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Key Points 

  • The Highest Common Factor (HCF) is the largest factor shared by two or more numbers.

  • The Lowest Common Multiple (LCM) is the smallest common multiple.

  • Use prime factor decomposition to find the HCF and LCM efficiently.

  • Write numbers as a product of prime factors.


Keywords: HCF, LCM, prime factor decomposition, prime factors, GCSE maths.

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