Mobile roulette in Sri Lanka follows the same rules as regular roulette. The wheel is composed of 37 pockets (0-36) and the players can place wagers on black, red, odd, even, numbers 0-36, and arrangement of 12 numbers. The winning number is determined by spinning the wheel and a small ball dropping into one of the pockets. Players can bet on a single number, a series of numbers, or multiple numbers at once.