जब एक मानक घड़ी में दोपहर के 4 बजे का समय होता है, तो मिनट की सुई और घंटे की सुई के बीच का कोण कितना होता है?

What is the angle between the hour hand and the minute hand of a clock at 12:55?

There are two clocks, both set to show 10 p.m. on 21st January, 2010. One clock gains 2 minutes in an hour and the other clock loses 5 minutes in an hour. By how many minutes do the two clocks differ at 4 p.m. on 22nd January, 2010?