"If you turn over a playing card, the chance it will be red is 0.5, or 50%. If the casino was fair, it would pay you $1 for a $1 bet. But if a casino pays you $0.90 instead, it has a 5% edge."

"In 1930s Nevada, bingo was known as keno, and 'Chinese Lottery' was also called keno because lotteries were illegal. To further disguise it, it was called 'race-horse keno' and games were called races."

"Nowadays, most slot machines have multiple pay lines. You choose how many lines to play and how much to bet on each, but you must bet at least one coin on each line to activate it or winning that line won't count."

"1930s Montana saw a game similar to the 'Chinese Lottery' become popular as people could win a lot of money from a tiny bet. Eventually this game travelled to the legal gambling pastures of Nevada."

"In the nineteenth century, immigrant labourers from China introduced keno, which would eventually become video keno, to the United States. Because of its origins, it was called the 'Chinese Lottery' at the time."