1 Between 1:00am of one day and 1:00am of the following day, how many times do the minute hand and the hour hand of a clock coincide?
2 How many times between 12:00am of one day and 12:00of the next day do the minute hand of a clock form a right angle?
Plx help!
It's better to tell me in chinese, but eng is fine 2!!!
更新1:
help!