12am to 4pm is 16 hours.
12 hours
18 hours
21
17
4
7
21
10
113 hours
Well, isn't that a happy little question! If we start at Sunday at 12am, we can count 24 hours to get to Monday at 12am, then another 24 hours to get to Tuesday at 12am, and finally one more day to get to Wednesday at 12am. So, 72 hours from Sunday at 12am is Wednesday at 12am. Just imagine all the wonderful things you can create in those 72 hours!
5 hours + 12 hours is 17 hours