Number Noun Adjectives
Rule 2.3: Do not pluralize numbernoun adjectives that precede a singular, countable noun
He won the world championship twenty times.
Correct: He’s a twentytime world champion boxer.
Incorrect: He’s twentytimes world champion boxer.
She’s a girl who is seven years old.
Correct: She’s a sevenyear old girl.
Incorrect: She’s seven years old girl.
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Exercise 16: Correct or incorrect?
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1. Question
1 pointsMrs. Smith taught threehours class.


Correct
Mrs. Smith taught a threehour class.
Incorrect
Mrs. Smith taught a threehour class.
 Question 2 of 5
2. Question
1 pointsTim and Ed are taking a sixmonth program.


Correct
Tim and Ed are taking a sixmonth program.
Incorrect
Tim and Ed are taking a sixmonth program.
 Question 3 of 5
3. Question
1 pointsCan you run a 25kilometers race?


Correct
Can you run a 25kilometer race?
Incorrect
Can you run a 25kilometer race?
 Question 4 of 5
4. Question
1 pointsShe is a 12year old girl.


Correct
She is a 12year old girl.
Incorrect
She is a 12year old girl.
 Question 5 of 5
5. Question
1 pointsElizabeth Taylor is a twotimes Academy Award winner.


Correct
Elizabeth Taylor is a twotime Academy Award winner.
Incorrect
Elizabeth Taylor is a twotime Academy Award winner.
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Exercise 16: Correct or incorrect?
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 Question 1 of 5
1. Question
1 pointsMrs. Smith taught threehours class.
CorrectMrs. Smith taught a threehour class.
IncorrectMrs. Smith taught a threehour class.
 Question 2 of 5
2. Question
1 pointsTim and Ed are taking a sixmonth program.
CorrectTim and Ed are taking a sixmonth program.
IncorrectTim and Ed are taking a sixmonth program.
 Question 3 of 5
3. Question
1 pointsCan you run a 25kilometers race?
CorrectCan you run a 25kilometer race?
IncorrectCan you run a 25kilometer race?
 Question 4 of 5
4. Question
1 pointsShe is a 12year old girl.
CorrectShe is a 12year old girl.
IncorrectShe is a 12year old girl.
 Question 5 of 5
5. Question
1 pointsElizabeth Taylor is a twotimes Academy Award winner.
CorrectElizabeth Taylor is a twotime Academy Award winner.
IncorrectElizabeth Taylor is a twotime Academy Award winner.
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Exercise 17: Choose the correct answer
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1. Question
1 pointsI worked ten ___ today.


Correct
I worked ten hours today.
Incorrect
I worked ten hours today.
 Question 2 of 8
2. Question
1 pointsI worked a ten ___ day.


Correct
I worked a tenhour day.
Incorrect
I worked a tenhour day.
 Question 3 of 8
3. Question
1 pointsThey went on vacation for five ___.


Correct
They went on vacation for five weeks.
Incorrect
They went on vacation for five weeks.
 Question 4 of 8
4. Question
1 pointsThey went on a five ___ vacation.


Correct
They went on a fiveweek vacation.
Incorrect
They went on a fiveweek vacation.
 Question 5 of 8
5. Question
1 pointsHe found a twentyfive ___ coin


Correct
He found a twentyfive cent coin
Incorrect
He found a twentyfive cent coin
 Question 6 of 8
6. Question
1 pointsHe found twentyfive ___


Correct
He found twentyfive cents
Incorrect
He found twentyfive cents
 Question 7 of 8
7. Question
1 pointsThe essay was one thousand ___ long.


Correct
The essay was one thousand pages long.
Incorrect
The essay was one thousand pages long.
 Question 8 of 8
8. Question
1 pointsIt was a onethousand ___ essay.


Correct
It was a onethousandpage essay.
Incorrect
It was a onethousandpage essay.
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Exercise 17: Choose the correct answer
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 Review
 Question 1 of 8
1. Question
1 pointsI worked ten ___ today.
CorrectI worked ten hours today.
IncorrectI worked ten hours today.
 Question 2 of 8
2. Question
1 pointsI worked a ten ___ day.
CorrectI worked a tenhour day.
IncorrectI worked a tenhour day.
 Question 3 of 8
3. Question
1 pointsThey went on vacation for five ___.
CorrectThey went on vacation for five weeks.
IncorrectThey went on vacation for five weeks.
 Question 4 of 8
4. Question
1 pointsThey went on a five ___ vacation.
CorrectThey went on a fiveweek vacation.
IncorrectThey went on a fiveweek vacation.
 Question 5 of 8
5. Question
1 pointsHe found a twentyfive ___ coin
CorrectHe found a twentyfive cent coin
IncorrectHe found a twentyfive cent coin
 Question 6 of 8
6. Question
1 pointsHe found twentyfive ___
CorrectHe found twentyfive cents
IncorrectHe found twentyfive cents
 Question 7 of 8
7. Question
1 pointsThe essay was one thousand ___ long.
CorrectThe essay was one thousand pages long.
IncorrectThe essay was one thousand pages long.
 Question 8 of 8
8. Question
1 pointsIt was a onethousand ___ essay.
CorrectIt was a onethousandpage essay.
IncorrectIt was a onethousandpage essay.