Sharpen your mind and blitz your brain with a workout of more than 500 challenging puzzles. These tricky numeric and alphabetic questions will stimulate your smarts as never before, and help your IQ climb higher and higher. And the puzzles are fun too, because some of them involve unfolded cubes, aliens, watches, and matchsticks. Rev up that logic, steady that concentration, and get going on 20 levels of ascending difficulty. Assess your progress in the art of problem solving, and gather your wits at every stage. Which letter is the odd one out in a pattern? What shape continues a sequence? Which of five cubes can be made from a template? Test your lateral thinking abilities, try out mathematical teasers, play letter and word games, figure out visual and spatial problems, solve riddles, and above all...watch out for the unexpected. Hours of entertainment lie ahead. Read Less