GCSE Maths (Edexcel)

435 videos | 33 hours

Highest Common Factor

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Number Structure and Calculation

Highest Common Factor

2:59 HCF & LCM
Spec N4
Previous Prime Factor Tree Next HCF & Prime Factorisations
  • A common factor of two numbers is a number that appears in both of their lists of factors
  • The highest common factor (HCF) of two numbers is the largest number that is a factor of both numbers
  • The HCF is often abbreviated as HCF
  • The HCF can also be found for three or more numbers
  • Finding the HCF can be useful when simplifying fractions
  • Dividing both the numerator and denominator of a fraction by their HCF will simplify the fraction completely

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