I am looking for a strategy to learn this information off pat without the necessity of reference to a ‘hand-held roulette card’. For example opposite a zero, one would find the following two numbers a 5 and a 10 (as there are two numbers opposite each number). The other thing I’d like to know is which two numbers are directly opposite each number on the roulette wheel. So I would like to know for example that number 28 is black and that number 36 is red for example. Firstly I would like to be able to differentiate between all numbers in terms of their colors. I’m seeking some assistance in trying to learn the numbers around a European roulette wheel, that is the roulette wheel with one single green zero and not the American roulette wheel where there are two zeros (a 0 and a 00).