One mustn't be limited on the strategies named above. The winner is determined on basis of the bets he places corresponding to the volume of or color the ball lands on. This bet exists only in American roulette as well as the player bets on 1, 2, 3, 00 and 0. https://www.localtrusted.co.uk/wiki/index.php?title=Roulette_Betting_Strategies_-_How_To_Bet_On_A_Roulette_Table