Developed in France and named after the the French word for a small wheel, roulette is one of the most famous casino games in the world, enjoyed by many for over 200 years.
Its significant popularity probably owes to its simplicity and fair odds. Interestingly, it was not originally conceived to be a game of hazard, but rather a random number generator.
(Roulette mechanism, source: www.wikipedia.org)
The objective of the game is to guess the winning number. This is determined by a small ball thrown into a track encircling a horizontal wheel, containing numbered and equally-sized pockets separated by barriers. After being thrown into the roulette wheel, the ball adheres to the track by the action of centrifugal force. As the ball loses momentum, it leaves the track and falls into one of the numbered pockets. For added randomness, the inside of the wheel rotates in the opposite direction. The ball can also change its direction as a result of small obstacles on the wheel.