Roulette is a casino game named after the French word meaning little wheel. In the game, players may choose to place bets on either a single number or a range of numbers, the colors red or black, or whether the number is odd or even. To determine the winning number and color, a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular track running around the circumference of the wheel. The ball eventually loses momentum and falls onto the wheel and into one of the colored and numbered pockets on the wheel.

There are 38 numbers (00, 0, 1-36) on an American roulette wheel and there are 37 numbers (0, 1-36) on a French roulette wheel. The numbers on either wheel adds up to 666.

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