With Numeroso, numbers visually come alive in our card battler game, along with a variety of games inspired by classic card game mechanics. Numeroso Cards are based on a powerful Natural Structure of Numbers: prime factorization. Prime factorization is like the DNA of numbers, each number is made up of a unique collection of prime factors. Numeroso cards show the unique structure of each number visually. In the title game, Numeroso, the prime number cards are used to bring composite number cards into play that contain them in their prime factorization. The composite cards act as creatures with attack/defense strength and special abilities. Players do battle until their life points hit zero. —description from the publisher

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