Let's say that instead of marking 6 numbers, we want to mark 11 numbers. If we have the possibility of playing multiple numbers, we can do so, but the cost of the bet will increase to something unaffordable.
What do we do then?
Well, here's the magic.
We want to play the numbers
1 7 12 19 21 28 31 34 38 40 42
We have to apply the following formula
2 3 4 6 7 9
3 4 5 7 8 10
4 5 6 8 9 11
1 5 6 7 9 10
2 6 7 8 10 11
1 3 7 8 9 11
1 2 4 8 9 10
2 3 5 9 10 11
1 3 4 6 10 11
1 2 4 5 7 11
1 2 3 5 6 8
How do we do it? It's easy
When you do it a few times it will be very simple.
In the formula we substitute the numbers according to their order
1 7 12 19 21 28 31 34 38 40 42
1 is 1, 2 is 7, 3 is 12, 4 is 19, etc...
The result will be the following
7 12 19 28 31 38
12 19 21 31 34 40
19 21 28 34 38 42
1 21 28 31 38 40
7 28 31 34 40 42
1 12 31 34 38 42
1 7 19 34 38 40
7 12 21 38 40 42
1 12 19 28 40 42
1 7 19 21 31 42
1 7 12 21 28 34
Well, this is just a small example of what I show in my books. Many more numbers are played. Imagine the possibilities!