Rule number one is to know the game you're playing. In card games, there are plenty of different strategies to use. Random number generator : modern machine had been designed to use the pseudo random number generator or prng. Theseare bonus rounds that can all be triggered whenever you spin the reels. How do you know if a casino is secure or not? Take advantage of the demo games available, and learn the games before playing with real money! The optimal play is the payback percentage which is based on the gambler by the use of optimal strategy skill in the skill based machine. The reels spin and then stop in order to reveal one or even more symbols. .