For those that love trivia, Mensa has brought you these official Mensa Card Puzzles and Challenges (Riddles & Conundrums). The deck of cards contains brain-boggling challenges, from logical thinking and number challenges to problem-solving and shape manipulation puzzles. With 50 different challenges available, these puzzles will keep your mental capacity in tip-top shape. Do the puzzles yourself to see how you stack up, or bring them out for your next game night and challenge your friends. This is a great gift for anyone who is into brain-boggling trivia games!