Counting Game Variation: The Math Game (game) Competitors hold just one hand behind their back, revealing the number of fingers at the signal. Whoever yells out the sum of the fingers wins the first round. For Round 2, multiply the fingers. Round 3 is the difference between the two numbers. Rotate through as many rounds as you want. For the left-brained at heart, the Championship Round has the two survivors (who you'll bring up front) square the total of the two sets of fingers. For example, Person A shows three fingers, Person B shows four, so the winning answer is 3+4 = 7 * 7=49