Those who thrill to a mind-bending challenge have met their match in this one-of-a-kind collection. Readers can match wits with an elite class of master problem solvers in a wide variety of math, logic, and word games. These games are inspired by members of MENSA, the organization made up of people with an I.Q. of 140 or more. Puzzle addict James Fixx invites readers to sharpen their pencils and their wits with each brain-crunching entry. Answers are provided at the back of the book, as well as information that will help readers discover if they, like Fixx, are MENSA material.