11pm
Friday 11pm to Monday 11pm is exactly 3 days or 72 hours.
10 hours
24 hours
48 hours.
There are 72 + 168n hours where n is an integer.
15
It's 120 hours between 6pm Thursday until the following Tuesday at 6pm
7 hours
From 8:15am to 6pm is 9 hours and 45 minutes.
72 hrs
6 hours