The fast paced fame of mental math, Proof! is an award-winning, fast, fun, and addicting math game that the whole family can enjoy! Work that mental math magic as you race to find creative equations hidden among nine number cards.

• Award-winning math game loved by teachers, parents, kids, and grown-ups alike
• Perfect for 2-6 players, ages 9-109. Adaptable rules for younger players, too.
• Comes with 100 number cards chosen for optimal fun
• Great brain training to improve creative mental math skills
• Practice multiplication, division, addition, subtraction, and square roots