How to find prime factors

Here we have a maths worksheet for year 6 on how to find prime factors. Before attempting this page it is necessary for children to have a good understanding of factors and prime numbers.

Finding prime factors is often done in the form of a diagram, rather like a tree diagram with the numbers at the bottom all being the prime factors. Frequently the same number is found more than once. For example the prime factors of 36 are 3, 3, 2 and 2.

A good way of checking if all the factors have been found is to multiply them and the original number should result. eg 3 x 3 x 2 x 2 = 36

This page is found in our Year 6 calculating section but has also been included in the Block planning resources:

Year 6 Block B Unit 3 Week 1: Securing number facts

How to find prime factors