The World's Most Challenging Puzzles

YA Puzzles and problems concerning poker chips, presidents, tennis balls, missing letters, ancient coins and other oddities are gathered here. Townsend has culled this assortment from the past 100 years of puzzle publications and cites Victorian writer Angelo Lewis, better known as Professor Hoffman, as the best and most prolific source. Each puzzle is presented on a single page and illustrated with an appropriate and often humorous black-and-white drawing. Answers are included at the back. There is mental entertainment, magic, math, and more in this collection of classic tricks and problems.