Clock Puzzles - General Questions

What angle do the hands of a clock make at 4:15?

A clock gains 2 minutes every hour. It is set right at 12 noon. What time will it show after 6 hours of actual time?

A clock gains 4 minutes every hour. It is set right at 12 noon. What time will it show after 10 hours of actual time?

What angle do the hands of a clock make at 12:20?

A clock gains 3 minutes every hour. It is set right at 12 noon. What time will it show after 24 hours of actual time?