Roullete (also known as roulette) is a casino game in which a small ball, called a “pelota”, rolls around a spinning wheel and people place bets on which number it will land on. Players may choose to bet on a single number, various groupings of numbers, the color red or black, or whether they are high or low (1-18 or 19-36). The payout odds for these bets are based on their probability. Bets placed on the numbers themselves are called inside bets; those placed on other sections of the table are outside bets.
The Dozens Bet: Also known as impair et manque in French, this bet wagers that the winning number will belong to either the first 12 on the layout (1-18), the second 12, or the third dozen (19-36). This is another even-money bet with a payout of 2-1.
The Split Bet: Also known as a cheval in French, this bet places your chip(s) to straddle the line between two adjacent numbers on the layout. This bet is another outside bet with a payout of 17-1.
The Roulette Wheel: A solid wooden disk slightly convex in shape, the roulette wheel contains thirty-six compartments or pockets, painted alternately red and black, with a green pocket on American wheels which carries the signs 0 and 00. A croupier spins the wheel and, when the ball lands in one of these pockets, the player is paid according to their bet.