How many floors does this building have?
In America we would say 4 floors. 1st, 2nd, 3rd, and 4th.
Here in Nepal they would also say 4 (I think) but they are labeled differently.
This really only presents a problem when someone is trying to tell you which floor they live on and you are trying to describe it cross-culturally. It gets confusing. There are times when I can't remember which was is American and which way is Nepali. In your mind you can easily understand it, but try getting caught off guard with the question and having just a second to think of the answer. It's not as easy as it might seem. Unless of course I see something like this. Elevator buttons.
This makes sense to me. It is like a number line. Notice the basement floors as -1 and -2. All of it makes sense, just takes some time to get used to it.