This is a relatively simple game. You'll be awarded 25ZP for ever number you guess correctly. The board is as follows:
You have your chosen numbers (which I've filled in) at the bottom, and the Keno Board at the top.
I'd suggest using a pattern since the game likes to use grouped numbers, such as 24, 34, 44, 54.
Try a line of 5, 15, 25, 25, 45, 55, or maybe even 20, 30, 40, 50 depending on which group of numbers you think will come up.
Simple press the 'Play Keno!' button and...
And there you have it. Seems I have 7 numbers right giving me a total of 175ZP :)
You can play Keno three times a day.