If you look at a clock and the time is 3:15, what is the angle between the hour and the minute hands?

For continuous clock where hours and minutes hands move continuously then the answer is 7.5 Minutes.
3.25* 30 - 15*6 = 7.5

For discrete clock where minutes hand moves after 60 secs and hours hand moves after 12 mins then the answer is 6 minutes.