Put your grey matter to the test, with Mensa Challenge Your IQ, from Family Games America. Set aside some quiet time and tackle this test of your logical thinking and problem-solving skills. Then relax and answer the questions provided on the cards. You"ll discover what your cognitive strengths and weaknesses are. Mensa tested and Mensa approved. The set includes 50 jumbo 4" x 6" cards, instructions and a box that doubles as a card stand. For 20 years, Family Games America has been providing fun, safe, eco-responsible games, puzzles and activities for players of all ages. At Family Games, we use recycled materials, responsibly sourced wood and soy based inks in all our products.