Mensa(r) Aarp(r) Challenging Brain Twisters: 100 Logic and Number Puzzles

Fred Coughlin has a PhD in inorganic chemistry, and has been solving and creating puzzles since childhood. He also published puzzles in The Art of Puzzles and on PuzzlePicnic.com, and has appeared as a contestant on Who Wants to Be a Millionaire? and Wheel of Fortune. He is happily married, with three daughters who are on their way to becoming avid puzzlers themselves. American Mensa has members who range in age from 2 to 102, and the community includes people from every walk of life. They include engineers, homemakers, teachers, actors, athletes, students, and CEOs, and all share one trait--high intelligence. To qualify for Mensa, our members scored in the top 2 percent of the general population on an accepted standardized intelligence test. AARP is the nation's largest nonprofit, nonpartisan organization dedicated to empowering Americans 50 and older to choose how they live as they age. With nearly 38 million members and offices in every state, the District of Columbia, Puerto Rico, and the U.S. Virgin Islands, AARP works to strengthen communities and advocate for what matters most to families with a focus on health security, financial stability and personal fulfillment. AARP also works for individuals in the marketplace by sparking new solutions and allowing carefully chosen, high-quality products and services to carry the AARP name. As a trusted source for news and information, AARP produces the world's largest circulation publications, AARP The Magazine and AARP Bulletin.