Which is correct?
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1. It's quite a long book. There are 450 page / 450 pages.
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2. I didn't have any change. I only had a twenty-pound / twenty pounds note.
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3. I looked down and there were two ten-pound / ten pounds notes on the ground.
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4. At work in the morning I usually have a 15-minute / 15 minutes break for coffee.
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5. There are 60-minute / 60 minutes in an hour.
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6. lt's only a two-hour / two hours flight from London to Madrid.
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7. My office is on the tenth floor of a twelve-storey / twelve storeys building.
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8. I work five-day / five days a week. Saturday and Sunday are free.
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9. Five-star / Five stars hotels are the most expensive.
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10. Sam's daughter is six-year-old / six years old.
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11. The oldest building in the city is the 500-year-old / 500 years old castle.
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12. Do you use the twelve-hour / twelve hours clock or the 24-hour clock?
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