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

Check

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.

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