
A lotto game in which a set of numbers (typically 20) is selected from a large field of numbers (typically 80). Players select a smaller set of numbers (up to 10) and are awarded prizes based on how many of their numbers match those in the drawn set. Players have discretion over how many numbers to select, and can choose to play for a small prize with good odds (by selecting a small set of numbers such as three), a large prize with much greater odds (by selecting a large set of numbers such as 10) or combinations in between. In casinos, and with several lotteries, keno is played at frequent intervals, with drawings as close together as every five minutes. 