GCSE Secondary Maths Age 13-17 - Number: HCF - Explained

The video tutorial explains how to find the highest common factor (HCF) of the numbers 32, 48, and 72 using factor trees. It breaks down each number into its prime factors and identifies the common factors among them. The tutorial concludes that the HCF is 8 and discusses the importance of method choice, emphasizing that different starting points in factorization lead to the same result.

What is the highest common factor (HCF) of the numbers 32, 48, and 72?

Explain the method used to find the prime factors of 32.

Describe how you would break down the number 48 into its prime factors.

What are the prime factors of 72, and how did you determine them?

How can you verify that the highest common factor you found is correct?