536 Puzzles and Curious Problems Author:Henry E. Dudeney In his Introduction, editor Martin Gardner hails Henry E. Dudeney as "England's greatest maker of puzzles," unsurpassed in the quantity and quality of his inventions. This compilation of long-inaccessible challenges ranges from arithmetical and algebraical problems to those involving geometry, combinatorics, and topology, plus game, domino, and ... more »match puzzles. Includes answers. « less