Keno, similar to Lotto, was first introduced in China many many moons ago. If you’re interested in a bit of bite-sized history - The game was taken to the USA in the mid 1800's by the Chinese immigrants who went to work the mines and the railroad.
It is a very popular game in the US, very easy to pick up and, most importantly, offers the possibility of winning large payouts on relatively small wagers.
Keno is a cross between playing the lottery and bingo. The Keno card (called a Board) is similar to the Bingo card, with 80 numbers printed on it. The aim of the game is to predict as many of the 10 numbers that are selected in each round as possible.
Online, the computer, draws these numbers randomly, and the online Keno player can choose to bet on anywhere between 1 and 10 numbers that he or she believes will come up (like the lottery!), when a player matches a number chosen at random it is called a ‘Hit’. The payout is dependant on the pick of numbers you selected and the pick of numbers called. However, the more numbers you pick, the less you will receive for a small amount of numbers matched, maybe nothing (games are usually $1, $3 or maximum $5 bets)
Often, you are given the option to have the computer select a random 10 numbers for you, if you prefer (like a lottery ‘Lucky dip’). You should see a button labeled "Automatically Deal 10 Numbers" or something similar. When you have picked a number, it turns green. If you wish to de-select a number, just click on it again. Handily, you'll see your potential payoff in one corner of your online Keno screen as you choose your numbers.