MathDB

361

Part of 1983 All Soviet Union Mathematical Olympiad

Problems(1)

ASU 361 All Soviet Union MO 1983 tribe language alphabet contains 2 letters

Source:

7/28/2019
The Abba tribe language alphabet contains two letters only. Not a word of this language is a beginning of another word. Can this tribe vocabulary contain 33 four-letter, 1010 five-letter, 3030 six-letter and 55 seven-letter words?
combinatoricsWords