Nope.....that doesnt sound right to me either. Especially when the fact is there is usually a 60% repeat rate of a digit from previous game. If not repeat digit, then usually the game prior to that game will have the digit.
In other words, either a digit will repeat or the first digit to play will be 2 games out. If there is "no repeat" then you can eliminate up to 3 digits of the 10 from consideration regardless of whether you get the "magical" number or not.
Sorry if you thought I was saying it would take 300 combos to play one number because that wasnt what I was saying. Was saying "1 digit/1 position". Just happens there are 100 exact combinations for each of the digits in each of the positions but if you key in on the position you only have to work with 100 combinations.
Some considerations you can give is when there is a repeat, will it be an Even or Odd digit to repeat. Tracking that fact to make your decision when you are coming off an Even game you have a 50/50 chance of getting the Even digit if "Even" is what repeats....or 50/50 chance of coming off an ODD game if an "odd" digit repeats. If you can determine the repeat digit will be Odd coming off an Even game you have the digit. Same goes for Even digit repeating out of an Odd game.
Coming off a PURE game though you are left with the 1 out of 3.