Roulette wheels come in different variations with varying numbers of pockets. The most common types are American and European roulette wheels.
The European roulette wheel contains 37 numbers in total. This includes numbers 1 through 36 plus a single zero （0）. The numbers are arranged in a specific pattern around the wheel, with red and black alternating, and the zero typically colored green. 
The American roulette wheel has 38 numbers total. It includes numbers 1 through 36, plus both a single zero （0） and a double zero （00）. The additional double zero increases the house edge compared to European roulette.
The numbers on roulette wheels are not arranged in numerical order. Instead, they follow a carefully designed sequence to ensure an even distribution of high/low, odd/even, and red/black numbers around the wheel circumference. |
