H. E. Dudeney, Amusements in Mathematics (1917) No. 266 · Puzzles · Logic
A Tennis Tournament
Four married couples played a "mixed double" tennis tournament, a man and a lady always playing against a man and a lady. But no person ever played with or against any other person more than once. Can you show how they all could have played together in the two courts on three successive days? This is a little puzzle of a quite practical kind, and it is just perplexing enough to be interesting.
H. E. Dudeney, Amusements in Mathematics (1917) · No. 266
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