Most slot machines have a free spins round. At the same time, many of these rounds offer a different number of free spins, for example, from 10 to 25. How do slot machines determine how many spins to award a player?
It all starts with the creation of a slot machine. This is included in the math of the slot. The mathematician determines the probability percentage, weight and range of random numbers for a specific number of free spins. For example, see the table below.
| Number of Free Spins | Weight | Probability | Random numbers |
| 10 | 40 | 40% | 1-40 |
| 12 | 25 | 25% | 41-65 |
| 15 | 20 | 20% | 66-85 |
| 25 | 10 | 10% | 86-95 |
| 40 | 5 | 5% | 96-100 |
After the slot machine is programmed according to this scheme, the game will proceed as follows. A random number generator (RNG) is used to determine the number. Let's assume that the RNG gave out 11. Then 10 free spins are activated for you. Since if you look at the last column of the top table, the number 11 refers to the range that gives 10 free spins.
If, for example, instead of 11, the RNG determines the number 100, then the player will receive 40 free spins. The wider the range of numbers, the more likely it is to activate one or another package of free spins.
Since the smallest package (10 FS) corresponds to the highest probability (40%), this is the number of free spins that will be activated most often. You have probably noticed that the maximum number of free spins drops out much less frequently. For example, if you focus on the table above, then out of 100 activations of the bonus round, on average, only 5 of them will give you 40 free spins.
This is the same principle that is used in slots in general. The larger the prize or jackpot, the less likely you are to win it. So, don't be angry that out of 10 bonus activations, you always get the minimum number of free spins. This is just a probability, not karma, and is unlikely to be a casino scam. Although the last option is not excluded if you register on dubious sites. Check out our blacklist to avoid scammers. And for greater reliability, you can choose top casinos from our rating.
Even developers with a fairly well-known name have been caught in the past for dishonest deeds. Therefore, fraud on the part of the game supplier is also possible. For example, Sheriff Gaming could manipulate the results of the game. And GameArt admitted that the RTP of the demo game was different from the RTP of the regular mode.
In the case of GameArt, it was just the bonus rounds that mattered. In the demo mode, they dropped out too often, while in the real game the correct settings were used. You might think that the free mode means nothing, but this is a very serious scam that is aimed at tricking players into attracting players.
Keep in mind that the probability is observed only over a long period of time. For example, at 10,000 activations of the free spins round. Casinos often receive complaints that the games are rigged, as players cannot claim some coveted prize or bonus round. But operators rarely pay attention to this, as they understand that many are simply not familiar with how games work.
If we use our table and take 10,000 bonus round activations, then on average 500 times players will receive 40 free spins. The remaining 9,500 times the number of free spins will vary from 10 to 25. It is quite logical that in your 10 or even 50 bonus rounds you will not get the maximum free spins package.
Often the number of free spins is determined not by chance after the activation of the bonus round, but based on the number of scatters. For example, 3 scatters - 10 free spins, 4 scatters - 15, 5 scatters - 30. Here, the number of scatters on each reel will play a role.
Each reel has a certain number of symbols. Let's say there are 30 symbols on the first and second reels, 3 of them are scatters, on the third reel there are only 2 scatters, and on the fourth and fifth one each. For example, the probability of getting three scatters on the first three reels is: 3/30*3/30*2/30=0.00067%.
