Official Mensa IQ Challenge cards Challenge your IQ and see how your intelligence ranks Pack of 50 large cards featuring a series of Mensa tests covering logical thinking, problem solving, number and shape awareness Become the pub quiz champion in no time Suitable for age 14 and over The Official Mensa IQ Challenge is a pack of 50 cards featuring logical thinking, problem solving, shape manipulation and number challenges. Box dimensions 15.7 x 10.5 x 2.5 cm. Suitable for age 14 and up.