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A combinatorial puzzle

Published online by Cambridge University Press:  22 September 2016

Michael Worboys
Michael Worboys*
Affiliation:
Department of Mathematics and Computing, Leeds Polytechnic
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Extract

A puzzle which introduces simple ideas relating to deduction within a mathematical system in a concrete and problem-oriented way is the following:

Find seven letters of the alphabet and seven three-letter words of the English language constructed from those letters such that each word contains three distinct letters and any two letters chosen from the seven letters belong to exactly one of the words.

Type
Research Article
Information
The Mathematical Gazette , Volume 66 , Issue 438 , December 1982 , pp. 255 - 258
Copyright
Copyright © Mathematical Association 1982

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