Mathematical Bafflers (Dover Recreational Math)

Over 155 truly challenging conundrums for the expert puzzlist. Algebraic amusements, geometric exercises, diophantine diversions, problems in logic and deduction, probability posers, insight puzzles, and assorted number theory problems. Advanced mathematical skills are only sporadically required, the majority of problems are accessible to just about anyone. 130 woodcut illustrations by Ed Kysar.