Explanation: Not all roulette games have 38 numbers on the wheel. French and European Roulette have 37: only one green pocket for zero, and numbered pockets (1 to 36) that alternate red or black. The American roulette wheel, on the other hand, has 38 pockets, comprising alternating black and red numbers, from 1 to 36, plus two green pockets – for a single 0 and a double 00. The layout of the wheel affects the house edge, which is 2.7% for the European variant and 5.26% for American roulette. In other words, if you were betting on a particular number in American roulette, the odds of winning would be lower (1 in 38), compared to European Roulette (1 in 37). If you’re wondering how this difference came about, it’s quite simple. American roulette was designed with an extra pocket to give the house a higher edge. Players of roulette in the UK favour neither of these variants, rather choosing their favourite variation based on the products on offer and personal preference. If you’d like to find out more about the odds of specific bets, read our review of Pragmatic Play’s Live Speed Roulette, where we break down the inside and outside bets.