# 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

#### Unit quizzes are being retired in August 2023

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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

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga