Topic Four (1.4): Prime numbers

Introduction Icon.png Introduction

Prime numbers are particular numbers, greater than 1, that have exactly two different factors, themselves and 1.  For example, 13 has two factors and can only be divided by 13 and 1. Therefore it is a prime number.

Skills Icon.pngHelpful hints

Try to remember that 1 is not a prime number, because it does not have two different factors.

Interact Icon.png Working through your course book

  • Go to the MyMaths 2B digital book and watch the videos on page 11.
  • Read through the information and example on page 10, which shows you how to check if a number is prime and then how to write a number as a product of prime factors.
  • Answer the questions on page 11.

If you would like more practice, work through this lesson on the MyMaths website:

You may also want to watch the following MathsWatch video and work through the interactive questions using the tab at the top of the screen:

WATCH - Prime Numbers - Factorisation (MathsWatch) Links to an external site.

Bridge Icon.png Support activities for this topic

The MyMaths 2A digital book introduces these topics at a slower pace. If you'd like to take more time to understand these, look at pages 10–11 for more support. 

Stretch Icon.png Extension activities for this topic

The MyMaths 2C digital book provides extension material in their problem-solving questions.

If you would like more of a challenge on factors, go to page 5 of the MyMaths 2C digital book and attempt questions 7 and 8.