The latter is found mostly in European and South American casinos and is seldom seen in this The United States. Most players and croupiers believe that the numbers 1 through 35 are arranged on the rim of the wheel in a haphazard manner, except that the red and black numbers alternate. An attempt has been make to alternate low, high, odd and even numbers, as well as the red and black colors, in such a way that each group of numbers, and each color is spaced out in a mathematically balanced fashion. A perfect mathematical balance is not possible, since the sum of the numbers 1 through 36 is 666, and the 18 odd numbers add to only 342. The 0 pocket is between two black-numbered pockets and the colors alternate in both directions around the wheel, ending in two red pockets, one on each side of the 00.
Odd numbers alternate with even numbers.
In order to get the best possible distribution of high and low numbers, the sum of each two successive numbers of the same color must equal 37. There are two exceptions, the numbers 9 and 28 and the numbers 10 and 27 which are not the same color, as each pair is made up of a red and black number. An excellent casino game of chance. Easy to learn. Originally invented by the French.