It is not difficult to understand the structure of the clock at first. There are 12 numbers on the clock, and each number has 5 cells. Seconds, minutes and hours are all in hexadecimal. Therefore, it is not difficult to draw a conclusion that 1 minute only needs one sixtieth turn, one turn equals 360 degrees, and 360÷60 is 6 degrees.

2: 15% angle, first calculate the angle between the clock and 12, then calculate the angle between the minute and 12, and finally find the difference between their two angles.

Clock: (2 ÷12) x360+(15 ÷ 60) ÷12x360 = 67.5.

Minute: (15 ÷ 60) x360 = 90.

So the angle between the clock and the minute is 90–67.5 = 22.5.