Sizing up "What keno numbers hit the most?" takes one look at the draw. Keno, bingo and scratch cards are the number games that sit closest to a lottery. Each one draws or reveals numbers at random, pays by a fixed table and asks nothing of the player beyond a choice of numbers or a ticket. What they pay, whether they can be rigged and how they work online explains why they are popular and why they cost more than they appear to.
Lottery scratch cards work from a print run whose number of winning tickets is fixed before any card is sold. Each card is printed as a winner or a loser; scratching only reveals which. They are not rigged in the sense of changing results, but the odds are set in advance and printed on the back or on the lottery's site, and many prizes simply return the price of the ticket. Buying late in a run changes nothing a buyer can see.
No keno numbers hit the most over time; each draw is independent, and any number that has come up often recently is just as likely as any other in the next draw. Players asking what numbers they should pick are really choosing how many: picking more spots changes the pay table and the odds, while which spots are chosen makes no difference. Birthdays and lucky numbers are as good as any, and just as bad.
Keno draws twenty numbers out of eighty, repeated every few minutes in venues or instantly on demand online.
Yes, the number of winning tickets in a print run is fixed before any card is sold, and scratching only reveals whether a card was printed a winner.
Smaller prizes are usually paid at any retailer selling that lottery's tickets up to a set amount, while larger wins are claimed from the lottery itself.
Licensed draws come from a certified generator or a filmed ball machine, so the operator cannot rig them; unlicensed rooms offer no such check.
Bingo prizes are paid from card sales minus the operator's share, so more players in a session mean bigger prizes and longer odds for each card.