# Four colour map theorem

In this lesson, we will think about a famous, long-standing, maths problem that has been recently solved known as the four colour theorem.

# 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:

# Four colour map theorem quiz

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

Q1.The four colour map theorem was finally solved in which decade?

1/3

Q2.Which of the below is a requirement of the four colour map theorem?

2/3

Q3.Fill the gap: We can think about maps in terms of _______.

3/3

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

Why we're removing unit quizzes from the website >
Quiz:

# Four colour map theorem quiz

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

Q1.The four colour map theorem was finally solved in which decade?

1/3

Q2.Which of the below is a requirement of the four colour map theorem?

2/3

Q3.Fill the gap: We can think about maps in terms of _______.

3/3

# Lesson summary: Four colour map theorem

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga