Product Description: Divide a rectangular cake into five even pieces, calculate the cost of running a successful casino, figure out the maximum number of losses on the road to winning the U.S. Open Tennis Championship, and solve other amusing and challenging puzzles — including a mathematical brainteaser involving a couple of holes of golf on the surface of the moon...read more

Product Description: Are you sharp enough to solve these devious mind-bogglers? These diverting number, geometric, logic, analytical, and story problems--which vary in difficulty from pleasantly puzzling to chew-your-pencil challenging--will test your smarts...read more

Product Description: Ready for a challenge? These puzzles offer a workout for your mathematical thinking processes along with your aptitude for logic and insight and your grasp of geometrical and analytical concepts. They'll test your perseverance, too! Suitable for dedicated puzzlists ages 12 and older, these 123 brainteasers vary in difficulty, ranging from playful puzzles involving games to tough questions of probability...read more