- In English, we can make a hyphenated adjective (compound adjective) with a number and a noun.
The noun after the hyphen will always be singular, NOT plural!
The Empire State Building has 102 stories.
=> It's a 102-story building.
- Numbers below should be written as words:
There are nine men on the team.
=> It's a nine-man team.
Two cars fit in my garage.
=> It's a two-car garage.
- Sometimes three words are hyphenated together, especially with OLD:
My daughter is three years old.
=> She's a three-year-old girl.
The building is thirty years old.
=> It’s a 30-year-old building.