70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web.
Cryptarithms OnlineA large collection of cryptarithms and alphametics, including cryptarithms from the journal Sphinx, a Primer on Cryptarithmetic, books, and links to the best collections of alphametics on the Web.
70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web.
Cryptarithms Online