A martingale is a class of betting strategies that originated from and were popular in 18th-century France. The simplest of these strategies was designed for a game in which the gambler wins the stake if a coin comes up heads and loses if it comes up tails. The strategy had the gambler double the bet after every loss, so that the first win would recover all previous losses plus win a profit equal to the original stake. Thus the strategy is an instantiation of the St. Petersburg paradox.(資料來源 )
Casino operators rely on tiny microchips known as number generators (RNGs) to ensure the unintended effect of spins on online slots. What is RNG technology? Simply put, RNG is a microchip designed to continue to generate numerical sequences, even if the slot game does not play. This set of numbers is fast-paced – and soon means faster than man, billions of times a second!
Random is the key to all kinds of casino games. That is why they are considered opportunity games. It is up to you to win or lose the spin of the reels. Of course, there are casino games where players can influence the outcome. Take blackjack as an example, with several strategies players can use to increase RTP percentages over time. The fact is that while blackjack players can make wise decisions using strategy, you cannot guarantee a winning hand. The shuffling and operation of the cards are unpredictable, as is the spinning of the reels inside the slot game.（原文出處：https://gamerules.com/rng-mechanisms-in-slot-machines-explained/ ）
