Are there two bulletin boards?
No, there aren't. There is one.
Are there fifteen windows?
No, there aren't. There are fourteen.
Are there eighteen calendar?
No, there aren't. There are seventeen.
Are there eighteen desks?
No, there aren't. There are nineteen.
Are there ten wastebaskets?
No, there aren't. There are eighteen.
Are there fifteen chairs?
No, there aren't. There are thirteen.
Are there eighteen computers?
No, there aren't. There are twenty.
Are there thirteen clocks?
No, there aren't. There are twelve.
Are there fifteen whiteboards?
Yes, there are.
Are there twelve projectors?
No, there aren't. There are eleven.
Are there fifteen posters?
No, there aren't. There are sixteen.