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# Tic Tac Toe

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Age 11 to 14

Challenge Level

- Problem
- Student Solutions

The ideas in this problem have been expanded and made into another, more detailed investigation. See Marbles in a Box.

In the game of Tic Tac Toe (i.e. noughts and crosses) there are 8 distinct winning lines.
Investigate how many distinct winning lines there are in a game played on a 3 by 3 by 3 board, with 27 cells. A winning line connects 3 cells. |