In Roulette, selecting 12 numbers to bet on is almost one third of the numbers on a European wheel since, aside from the one green Zero, there are 36 numbered pockets, 1-36, organised on the betting layout as 12 numbers in each of the three Columns and 12 numbers in each of the three Dozens.

In the game of roulette, a player can place aR$5 bet on the number 25 and have a 1/38 probability of winning. If the metal ball lands on 25, the player gets to keep theR$5 paid to play the game and the player is awarded in additionalR$175. Otherwise, the player is awarded nothing and the casino takes the playerR$5.

Say a single-number bet has a 35:1 payout, and you betR$1. If you win, you'll get your money back plusR$35. Another example: If you win aR$100 bet (for a 35:1 payout), you get a total of $3,600 ($3,500 profit plus theR$100 you initially bet).