Download or read book Mental Gymnastics written by Dick Hess and published by Courier Corporation. This book was released on 2011-06-16 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. Complete solutions appear at the end.