A bet on red is in this sense a bet on 18 numbers. Groups of numbers are, for example, all red numbers or all odd numbers or all numbers in a series. The riskier a bet is, the higher the possible profit a player can achieve when placing his bet.
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With this free roulette simulator you can try out and understand the aspects of probability, logic, the rules and strategies of roulette. Playing and Understanding Roulette through Practical Use
