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Question

How many times do the hands of a clock coincide in a day?

Options:
A .  20
B .  21
C .  22
D .  24
Answer: Option C

The hands of a clock coincide 11 times in every 12 hours (Since between 11 and 1, they coincide only once, i.e., at 12 o'clock).


AM


12:00
1:05
2:11
3:16
4:22
5:27
6:33
7:38
8:44
9:49
10:55


PM


12:00
1:05
2:11
3:16
4:22
5:27
6:33
7:38
8:44
9:49
10:55


The hands overlap about every 65 minutes, not every 60 minutes.


  So, The hands coincide 22 times in a day.


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