From: utzoo!decvax!harpo!floyd!jce Newsgroups: net.math Title: ABCDE puzzle Article-I.D.: floyd.372 Posted: Fri Jul 16 10:58:13 1982 Received: Sat Jul 17 01:47:47 1982 Yes, it's too easy. It took less than 5 minutes without a program. The key is to see that since the answer has the same number of digits as the multiplicand, there can be no carry out. This limits the range of A, which limits E, etc.