Henry Ernest Dudeney/Puzzles and Curious Problems/214 - Colouring the Map

by : $214$

 * Colouring the Map
 * Colonel Crackham asked his young son one morning to colour all the $26$ districts in this map
 * in such a way that no two contiguous districts should be the same colour.


 * Dudeney-Puzzles-and-Curious-Problems-214.png


 * The lad looked at it for a moment, and replied,
 * "I haven't enough colours by one in my box."


 * This was found to be correct.
 * How many colours had he?
 * He was not allowed to use black or white -- only colours.