0/0 isn't all numbers that exists, it's not defined. Maybe you mean that any number can be represented as the limit of the ratio of two null seuqences, but then why would you exclude i ? for example: i/n -> 0 ( n->oo) and 1/n->0 (n->oo) and (i/n) / (1/n) = i -> i (n ->oo)
Good to see, that there are people like zukaka out there who can handle math properly.
0.999... is just another notation for 1. The definition of a decimal representation is that it stands for the limit of a convergent series. In the case of 0.999... this limit happens to be 1.
I don't always swap at the Monty Hall Problem - but when I do, I have a 1/3 chance of winning a goat.