A classic slot machine in a casino has one pay line and three rows. In most slot machines with a 1×3 reel design, the quantity of 7s denotes a combination of valuable symbols. A victorious spin and a sizable payoff are both indicated by the combination of the 777 slot machine symbols. The number combination is used by slot machines to show a winning spin and to persuade players to feel lucky.(資料來源 )
Fruit machines work in a fairly simple way, although they have become much more complex over the past decade with the introduction of computer chips into their mechanism. Older style fruit machines would work purely on the basis of probability in terms of how much money they would pay out. Modern machines are usually set to pay out a certain percentage of any money that is put into them (usually between 75% and 80%). These machines are therefore much more likely to pay out if they have had a lot of money put into them but not payed out recently. For the questions that follow, we are only going to look at the older probability based fruit machines.(資料來源 )