Misprints and Rarities
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#039:4 Colour Theorem
One of the more enjoyable parts of your job is when you get to colour in a brand new map.
All sorts of wierd and wonderful maps cross your desk and you have to decide how different
areas are coloured, ensuring that no bordering segments share the same colour.
You only ever use four colours (red, green, blue, and yellow) knowing that it would be
impossible to with just three and a waste of ink to use five.*
This imaginary country is divided into nineteen different regions. While it can be coloured in
in many different ways, all of them require the area ? to be one particular colour.
WHAT COLOUR MUST IT BE?
*Discovering why 4 colours is always sufficient managed to perplex mathematicans for decades
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