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Using Cards as Dice (Posted on 2004-08-09) Difficulty: 2 of 5
A deck of nine cards can be numbered, so that the sum of the numbers on a randomly chosen pair of cards totals to an integer from 2 to 12 with the same frequency as rolling two standard dice. What are the numbers on the nine cards?

See The Solution Submitted by Brian Smith    
Rating: 2.7500 (4 votes)

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re: Query | Comment 2 of 9 |
(In reply to Query by Nick Williams)

There are 36 combinations of 9 things taken 2 at a time:  There are 9 choices for the first, times 8 choices for the second, but order doesn't matter so divide by 2.
  Posted by Charlie on 2004-08-09 10:37:42

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