Short system 10 numbers 5 deletions 6 bets

 Out of 80 numbers, 10 are chosen at random and spread over 6 bets of 5 deletions each.  The combinations can be used in various number games 

1 3 6 7 8
1 4 6 8 9
1 2 5 6 8
2 3 5 7 10
2 4 5 9 10
3 4 7 9 10
Replace the numbers from 1 to 10 with the desired numbers