When you write someone's age do you write like "15 year-old" or "15 year old"?

What is the proper way to write that? I never know whether to put that little line "-" and what is that lin " -" called anyways? THANKS.

Update:

I wasn't sure where to categorize this question. Is there a category for questions about grammer?

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  • Mamie
    Lv 7
    1 decade ago
    Best Answer

    When several words are used together as one adjective, they are hyphenated. Thus: 15-year-old.

    The 15-year-old boy is very smart.

    If you say The 15-year-old is very smart (and leave out the word 'boy'), it is still hyphenated because the word 'boy' is understood.

    If you are using the words as a noun (or a noun in apposition), they are not hyphenated.

    He is 15 years old.

  • 1 decade ago

    Use hyphens if the modifier is before the noun.

    eg. I have a 15-year-old son.

    Don't use hyphen if the modifier is after the noun.

    et. My son is 15 years old.

  • holly
    Lv 7
    1 decade ago

    15 year old...the line is called a hyphen.

    You're in the right category.

  • 1 decade ago

    15 year-old or 15 years old

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  • 1 decade ago

    15 year-old.

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