Small enough to take anywhere, yet packed with more than 300 brain-bending challenges! Pit your wits against logic-teasers, matchstick quizzes, number problems, riddles, geometry puzzles, visual conundrums, word wonders, picture problems, mazes, and much more. Test your memory, imagination, math skills, powers of observation and deductive reasoning, and other mental talents by becoming a detective, a magician, an architect, and a creative thinker. Play with dominoes, unscramble letters, uncover inconsistencies, and solve mysteries.