If the time now is T hours (on a 24 hour clock), then the answer is mod(21 - T, 24) hours.
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9:45 pm to midnight is 2 hours and 15 minutes Midnight to 8:30 am is 8 hours and 30 minutes Hence the total is 10 hours and 45 minutes = 10 and 3/4 or 10.75 hours
8:30pm to midnight is 3h30m Midnight to 6:30am is 6h30m Then 3:30 + 6:30 = 10:00 Answer: 10 hours or 8:30 to 8:30 = 12 hours Then minus 2 hours to 6:30 = 10 hours
Technically, 12 PM doesn't exist. It's either 12 noon (3 hours) or 12 midnight (15 hours).
It would be 15 hours. The time period designation changes at midnight, so 3 hours after 9 PM is 12:00 AM. 12 PM is 12 hours later.
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