In 20p Roulette, the most common bets include inside bets and outside bets. Inside bets, such as betting on specific numbers or groups of numbers, offer higher payouts but are riskier. Outside bets, like red/black or odd/even, have lower payouts but offer a nearly 50/50 chance of winning. You can also place corner bets, covering four numbers at once, or split bets, which cover two numbers. Understanding these betting options helps you manage your risk while playing.