The 4-2 Rule is a way to turn the number of drawing outs you have into your odds of hitting them. It's times 4 on the flop to hit on the turn or river, and times 2 on the turn to hit your draw on the river. Example: a flopped flush draw is 9 outs. Multiply this by 4, and the odds of hitting it by the river are 36%.

Like all gambling games, luck does play a major role in poker, especially in the short term. Poker is different than any other form of gambling, however. Unlike the other games on a casino floor, poker is a game of skill, and the world's top pros make money because they're the best players in the game.

Penny slot machines appeal to many players because, historically, they offered the lowest cost to play. For just a cent you could spin the reels and take a shot at a big win. You can still pay penny slots today both online and at the casino, for free or real money  but the name doesn't truly reflect the reality.

You have a single penny in your pocket, but you'd like to spin the reels? Worry not! Both online and brick-and-mortar casinos are packed with penny slots where you can bet with only a cent per payline and potentially earn a fortune. What are penny slots, then, and how do they work?