Sample Question #121 (brainteaser)
How many times do the hour and minute hands of a clock overlap during the 24-hour day? Let’s assume the day runs from 12 midnight to 12 midnight.
You need to notice (and tell the interviewer) two things:
1) The hour and minute hands overlap in every hour except when the hour is 11.
3) Since midnight is included twice, we have a total of 3 12 o’clock readings.
So the final answer is 10*2 + 3 = 23.
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