Anything but number clusters, the algorithms are prescribed to be random, but how the code is written makes it random alright but across all the spaces.

Imagine we had a draw in Keno 80 numbers and 20 will be drawn, the algorithm dictates that the next game numbers drawn will comprise of 25% from each space(25% of the first 20 drawn, 25% of the remaining 60 numbers) of course with some variation, so my next game I can try an select 25% out of 20 numbers instead, of 5 out of 80 if you can understand.

In Lotto 6 numbers are drawn, if we say Ball 1 is the lowest number drawn of the six numbers, what would you think is the highest number drawn for this Ball 1?
Anyone can download the results of these games an test the above