Within each topic, the problems are arranged in approximate order of difficulty. Detailed solutions (as well as hints) are provided for all problems, and specific answers for most.Invaluable as a supplement to a basic geometry textbook, this volume offers both further explorations on specific topics and practice in developing problem-solving techniques.

    The examples are rated by difficulty and the problems gradually become more difficult as you move through the book, leading you into the world of high-level chess tactics.This book will greatly improve the readers chess game.

    A collection of 200 word puzzles of infinite variety from NPR's "Puzzlemaster" Will Shortz.

    What they don't know is that a mysterious force has hypnotized whole tribes of Lemmings sending them on a path to self destruction - the reader must act to save the day.

    This collection will give students, teachers, and university professors a chance to experience the pleasure of wrestling with some beautiful problems of elementary mathematics. Readers can compare their sleuthing talents with those of Sherlock Holmes, who made a bad mistake regarding the first problem in the collection: Determine the direction of travel of a bicycle that has left its tracks in a patch of mud. The collection contains a variety of other unusual and interesting problems in geometry, algebra, combinatorics, and number theory. For example, if a pizza is sliced into eight 45-degree wedges meeting at a point other than the center of the pizza, and two people eat alternating wedges, will they get equal amounts of pizza? Or: Is an advertiser's claim that a certain unusual combination lock allows thousands of combinations justified? Complete solutions to the 191 problems are included with problem variations and topics for investigation.

    Here are 360 carefully constructed exercises that use words, numbers, and diagrams to test logic, numeracy geometry, physics, intuition, common sense, and imagination.