Fifteen is a game for two players that you can play anywhere, anytime. Try it without writing anything down. You take it in turns to choose one of the whole numbers 1 to 9 (and each number can only be chosen once). To win you have to pick 3 numbers that add up to 15.
Can you beat the computer?
The following games all have a similar structure and can be played using similar strategies.
We suggest tackling them in the order given.