GCSE Secondary Maths Age 13-17 - Number: Highest Common Factor - Explained

The video tutorial explains how to find the highest common factor (HCF) of 24 and 60. It begins with an introduction to the concept of HCF and discusses various methods to find it, such as factor trees. The tutorial then lists all the factors of 24 and 60, explaining each step. Finally, it identifies the highest common factor as 12 and concludes with a brief mention of the marking scheme for solving such problems.

What is one method mentioned for finding the highest common factor?

• Division method

• Using a calculator

• Factor trees

• Multiplication tables

Which of the following is a factor of 24?

• 7

• 9

• 8

• 5

What is the factor pair of 24 that includes the number 3?

• 3 and 6

• 3 and 8

• 3 and 9

• 3 and 12

Which number is not a factor of 60?

• 5

• 7

• 10

• 15

What is the highest common factor of 24 and 60?

• 12

• 10

• 8

• 6