150 Puzzles in Crypt-Arithmetic by Maxey Brooke - Book

This is a collection of arithmetical puzzles which operate by substituting letters fornumbers. They are solved by examination of the number relations between the variousgroups and symbols. This puzzle type, which the author calls a "cryptarithm," is oneof the most interesting of mathematical recreations, since it combines the challengeof the mathematical problem with that of cryptanalysis. Although it is one of thestandard ingredients of puzzle collections, no book devoted exclusively to this typeof problem has ever appeared before.For the benefit of newcomers to this sort of puzzle, the author explains clearly howto go about tackling it, and even works out the first four problems in detail. Solutionsfor all the problems appear in the answer section. The puzzles are stated carefullyand accurately, and almost one third of the solutions are fully worked out, analyzing althe mathematics and reasoning involved. The problemist need not fear the bewilderment that sometimes arises when proble