"Numero is a game for all ages. Simply set the level of difficulty to match the ability of the users. This is done be deciding which cards are included in the pack for a paryticlar game. To play numero well all players must start at the early stages and progress to more challenging levels. As a learning game it is best played between two people, which provides the optimum playing conditions to challenge minds and improve number skills, but can be played by up to four players."--Rules.