In the world of MindTrap, it"s not what you know - it"s how you think! The MindTrap Geometrical Riddles - Master Level challenges you to solve problems based on pattern recognition, geometrical puzzles, and mathematical riddles. Each problem is presented on a card, with the solution on the back. The deck of cards includes 54 different riddles designed to challenge your mental faculties! Recommended for ages 12 and up.