Slot machines have been around since the 1800s.

While slot machine odds favor the house, the house edge varies, and some games pay out better than others. Since they offer less favorable odds than keno or blackjack, Slot games might not be the first thing that comes to mind when you think about making piles of cash, but that doesn’t mean that all of them guarantee losses. That said, there are a few casino games where it’s conceivable to make money without having to change the laws of probability. Knowing that the odds are stacked against you is an important part of gambling.