Highest Common Factor Prime Factors

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HCF Using Prime Factors

We can use prime factors to help us find the highest common factor of two numbers. This is especially useful for dealing with large numbers that both have many factors, such as 40 and 60.

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2) Multiply prime factors

  • To find the highest common factor, we multiply the prime factors which are common to both 40 and 60.

Jump to other topics


1.1Place Value

1.2Factors & Multiples


1.4Fractions, Decimals & Percentages

1.5Growth & Decay

1.6Measurements & Units



3Ratio, Proportion & Rates of Change

4Geometry & Measures



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