Yes, it should be hyphenated like so: sixteen-year-old boys.
Yes it should be hyphenated.
That is disgusting, you should go to jail for that
No. The term "twelve year old" is a noun (someone who is 12). It can be an adjective, but should be hyphenated, as in twelve-year-old cat. *The Chicago Manual of Style suggests that both nouns and adjectives should be hyphenated. Other styles may differ.
An 18 year old girl can marry an 18 year old boy even if they are not in love in this state.
Hyphenated
"Twelve-year-old" is the correct way to write the age of a twelve-year-old individual. The phrase should be hyphenated when used as an adjective before a noun.
35 is not hyphenated, however, thirty-five is, used as an adjective before a noun. For example: 'I've lived here for 35 years' or 'She is 35 years old'. But: A 35-year-old car. (thirty-five-year-old car) (Note the 's' disappears)
The term 16-year-old is generally hyphenated when speaking of a person, such as, "The 16-year-old wept." If, however, you are using it in an adjectival way, such as, "The wine was from a 16 year old batch," it is unnecessary.
No, you are not. Your 18 year old is an adult.
No, the legal age of consent in Tennessee is 18. It would not be legal for an 18-year-old to engage in a romantic or sexual relationship with a 15-year-old.
at 18 you are legal. You could live with a 94 year old