lets say the last number that hit was 123 ..... as you can see above the vtrac for that is ... 234
so if you could reduce using vtracs ... the next drawing you could reduce using the 2 vtracs missing from the previous drawing .....
so if the last number drawn was 123 , which is vtrac 234 .... you would reduce your numbers by taking out all numbers that don't have the 2 missing vtracs from the last dawing .... which would be vtrac 1 and 5
which is digits 0 , 5 .. and 4 , 9
you can quickly eliminate A LOT of numbers just by doing that ....
