How many times will the hands of a clock coincide in a day?
The hands of a clock coincide 11 times in every 12 hours (Between 11 and 1, they coincide only once, at 12 oclock).
12:00 am
1:05 am
2:11 am
3:16 am
4:22 am
5:27 am
6:33 am
7:38 am
8:44 am
9:49 am
10:55 am
12:00 pm
1:05 pm
2:11 pm
3:16 pm
4:22 pm
5:27 pm
6:33 pm
7:38 pm
8:44 pm
9:49 pm
10:55 pm
Hence the hands coincide 22 times in a day.