This puzzle is rated 2 star (medium).

__Description__
An amateur darts player is looking to improve his average dart score. He notices that if he aims at a particular number he has a 1 in 3 chance of landing in that numbered sector, a 1 in 3 chance of landing in the sector one place clockwise of his aim and a 1 in 3 chance of landing in the sector one place to the left of his aim.

__Puzzle__
Where should he aim to maximise his average score?

Hint: in order the numbers are - 20, 1, 18, 4, 13, 6, 10, 15, 2, 17, 3, 19, 7, 16, 8, 11, 14, 9, 12, 5 and then back to 20 again.

Check the solutions page for the correct answer.