Prime Factorisation

In this lesson, we will investigate how to write a number as a product of its prime factors. We investigate the concept of prime factorisation

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of these numbers is not prime?

1/5

Q2.Which of these numbers is prime?

2/5

Q3.Which of these is the prime factorisation of 30?

3/5

Q4.Which of these is the prime factorisation of 50?

4/5

Q5.What is the final digit for this number:

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of these numbers is not prime?

1/5

Q2.Which of these numbers is prime?

2/5

Q3.Which of these is the prime factorisation of 30?

3/5

Q4.Which of these is the prime factorisation of 50?

4/5

Q5.What is the final digit for this number:

5/5

Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

  • Click "Close Video"
  • Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Prime Factorisation

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Express 42 as a product of its prime factors

1/5

Q2.Express 144 as a product of its prime factors.

2/5

Q3.Express 80 as a product of its prime factors.

3/5

Q4.Express 35 x 10 as a product of its prime factors.

4/5

Q5.Express 1750 as a product of its prime factors

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Prime Factorisation

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Express 42 as a product of its prime factors

1/5

Q2.Express 144 as a product of its prime factors.

2/5

Q3.Express 80 as a product of its prime factors.

3/5

Q4.Express 35 x 10 as a product of its prime factors.

4/5

Q5.Express 1750 as a product of its prime factors

5/5

Lesson summary: Prime Factorisation

It looks like you have not completed one of the quizzes.

To share your results with your teacher please complete one of the quizzes.

Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Dance

Browse Oak's lessons: