PAINTING THE DIE
In how many different ways may the numbers on a single die be marked, with the only condition that the `1` and `6`, the `2` and `5`, and the `3` and `4` must be on opposite sides? It is a simple enough question, and yet it will puzzle a good many people.
Topics:
Combinatorics
- Amusements in Mathematics, Henry Ernest Dudeney Question 286
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