BASICS
Slots are originated at the end of the 19th century by Charles Fey, but they became popular when Bugsy Siegel installed them in his famous Flamingo Hilton hotel in Las Vegas. They are popular - because they are played by one person only, with no opponents and the only necessary thing is a little bit of luck.
Slots evolved throughout the years from simple three-wheeled machines with 20 symbols to the wheels with random generated numbers and symbols - over a hundred of them! The more wheels in the machine the bigger the chance of losing is. To count the chance of a jackpot on three-wheeler with 20 symbols on each wheel we must multiply 20X20X20, which equals 8000. That makes the chance of winning a jackpot 7999 to 1. What about this chance with modern machines with over 120 symbols? 120X120X120 is 1,728,000. So the jackpot chances are 1,727,999 to 1!
Nowadays there are numerous randomizing generators, which determine the number of symbols on wheels. It is based on the amount of a jackpot - the higher it is, the rarer it is to hit. It is done on purpose because casinos have to get a profit from the machines. Strictly speaking, there are two kinds of slots - those with a progressive jackpot and without it. The progressive jackpot is the one the value of which grows with every coin thrown into the machine.
Slots is one of the simplest hazard games. To play you must only insert a coin, pull the handle and wait for Lady Luck.