perplexus.info :: Just Math : Extending tic-tac-toe

Extending tic-tac-toe (Posted on 2014-10-23)

In a standard 3x3 tic-ta-toe there are 8 distinct possibilities to create “three in a row”- 3 horizontal, 3 vertical and 2 diagonal.

How many ways are there in a three-dimensional 5x5x5 tic-tac-toe?

How about 6x6x6 ?

No Solution Yet Submitted by Ady TZIDON

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re: General Solution

Comment 6 of 6 |

(In reply to General Solution by Jer)

The formula works for n=9 (that is it matches my computer output for n=9).

Posted by Charlie on 2014-10-23 10:25:31

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