Civil Service Exam Reviewer · Logical Reasoning · hard

How many times in a full day (24 hours) do the hands of a clock form a right angle?

  1. 44
  2. 48
  3. 24
  4. 22

Answer

A. 44

Solution

The hands are at right angles 2 times every hour except twice in each 12-hour period (around 3 o'clock and 9 o'clock the two cases merge), giving 22 times in 12 hours and 44 times in 24 hours.

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