Word Ways
Abstract
Problem: From a doubled set of 21 different letters, to form 7 six-letter words such that any two taken at random shall have exactly one letter in common.
Recommended Citation
Lindon, J. A.
(1972)
"The Seven Sixes Problem,"
Word Ways: Vol. 5
:
Iss.
2
, Article 2.
Retrieved from:
https://digitalcommons.butler.edu/wordways/vol5/iss2/2
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