Slip in a $20 bill, hit the button and see what happens. You’ve played one slot machine, you’ve pretty much played them all, right? Wrong. People who frequently play slots have favorites, based on factors that go beyond how often the game pays off. What sets apart one slot machine from another? Consider the Buffalo series of games — the original, Buffalo Deluxe, Buffalo Grand and Buffalo Stampede. Enter any casino and you’ll find them. Buffalo has been named the top-performing game for four consecutive years in the annual Goldman Sachs Slot Survey. “It’s insane how popular it is,” said Paul Riley, a London-based gaming blogger. “It seems to be everywhere now. At one time, you might see one here or there; now, it’s like casinos have their own Buffalo areas.” What makes the game such a hit might surprise you. It’s largely about math. Continue reading here.