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We don't say downtown or uptown in the UK either.

Why not?
Почему же, мы говорим "квартира номер 4", "комната номер 10". Очень часто.[/quote]

That's with номер.

Я живу в квартире три <-- Is that grammatical Russian :P

илья- Excuse me, do you live in apartment four, on the third floor?

сергей-Yes I live there. What is your name?

илья-My name is илья петровский. What is your name?

сергей-My name is сергей...