They can bet by numbers, like even or odd, by colors like black or red and even more.
Sure, it may to some people; however, if you know what you do beforehand, it makes your experience a much easier and more enjoyable one. https://taigamepc.com/giai-tri/game-bai-rikvip-trai-nghiem-va-cam-nhan-cua-mot-game-thu-lau-nam/29