Players mark off anywhere between 1 and 20 different numbers on their Keno card. A Keno card is numbered 1 through 80, arranged in 8 rows of 10 numbers. If you have never played Keno before the good news is that the rules are incredibly Lottery or bingo like game with simple rules in which players guess which numbers will be drawn at random and get paid based on how many numbers they guess correctly. Keno is a popular game in casinos around the globe, online and off.