CMAT Clocks Questions

Angle between two hands of the clock at 3.15 P.M. is

A clock is set right at 8 am. The clock gains 8 minutes in a day. What will be the true time when the watch indicates 11 am the next day?

A clock is set right at 11 am. The clock gains 12 minutes in a day. What will be the true time when the watch indicates 5 pm on the next day?

A clock is set right at 10 am. The clock gains 10 minutes in a day. What will be the true time when the watch indicates 3 pm the next day?

A watch which gains uniformly is 2 minutes slow at 10:00 AM on Monday and is $$2\frac{1}{2}$$ minutes fast at 1:00 PM the following day. When did it show the correct time ?