150 puzzles in crypt-arithmetic
Subtitle: solved by substituting numbers for the letters
By: by Maxey Brooke
Edition: 2d rev. ed
Series: Dover books on math and word puzzles, logic, cryptography, etc
Publisher: Dover Publications
Published: 1969
Place of publication: New York
Language: eng
Number of pages: 72
Subjects: Puzzles
Other titles: Crypt-arithmetic