Online casino gambling has come a long way since is inception, with a far greater range of players than land based casinos ever attracted. The main reason for this expansion of interest is the range of casino games that online casinos can now offer to their customers alongside the usual roulette, blackjack and poker, including many forms of bingo and lotteries which rely on random numbers being drawn to determine winners. One of these numbers games is Keno, which is rapidly gaining in popularity on this side of the Atlantic, having been a hit in America for many years. Keno online usually requires gamblers to select up to twenty numbers from a possible eighty displayed on a grid. Twenty numbers are then randomly generated and the winnings depend on the number of correct selections drawn. Obviously, Keno is a very quick and simple casino game to play, although the odds paid to winning selections can be complicated and do vary from one online casino to another. Clearly the odds paid out depend not only on the number of correct selections, but also on the number of selections made. Online Keno players have far more chance of selecting say 5 winning numbers from 12 selections, than they would from just 6 selections, and the odds paid out reflect this difference in probabilities. Online gamblers can therefore effectively choose the odds they wish to play for simply by deciding how many numbers they select from the grid. Online Keno players can also play for fairly low stakes if they wish, so even a small budget can be stretched to extend their gambling experience. Of all the simple casino games available at online casinos, Keno probably offers online gamblers the greatest choice of risk and potential reward, which may also explain its increasing popularity amongst players new to the casino experience.