In area 1-36 there are 12 streets (1-3, 4-6 etc.)
Some years ago I won much money by betting that a number of streets would come with all three numbers. When two of the three had come, I simply bet the missing one.
Later I found out that such a procedure can be dangerous. Right after3 x 37 spins TWO NUMBERS ARE STILL MISSING (in avarage that is).
But think about this:
If exactly 2 numbers are missing, at least 10 streets must have been completed.
- - 3 - - - , - - 9 - - - - -
- - 4 - - - , - - 8 - - - - -
- - 5 - - - , - - 7 - - - - - .
And so forth and so on.
IN AVERAGE two streets should be filled all in within approx. 29 spins.