Four Colour Theorem

Show that no more than four colours are required to colour the regions of the map or pattern so that no two adjacent regions have the same colour

Squiggle Rectangles Polygons United States


Click on the regions to fill them with paint. The challenge is to ensure that two regions sharing a border are not filled with the same colour.

Click the 'Check' button when you think you have finished colouring in all of the regions. You can earn a Transum Trophy for getting the colouring correct.

The solutions to this and other Transum puzzles, exercises and activities are available in this space when you are signed in to your Transum subscription account. If you do not yet have an account and you are a teacher or parent you can apply for one here.

A Transum subscription also gives you access to the 'Class Admin' student management system and opens up ad-free access to the Transum website for you and your pupils.


©1997-2021 WWW.TRANSUM.ORG