A player may bet on single numbers, rows of numbers, or on adjacent numbers. A player also may play colors, odd or even numbers, among others. A bet on a single number pays 35 to 1, including the 0 and 00. Bets on red or black, odd or even pay 1 for 1, or even money.Author of Online Roulette the Winning Rules (2014 present) Author has 77 answers and 65.7K answer views 3y. In a 2-1 bet you bet 1 unit and if you win you get 3 returned. In casinos 2-1 bets are on 12 numbers 1 to 12, 13 to 24 and 25 to 36. In fact they can be any combination of 12 numbers be they in columns or rows.
