Multiple choice general knowledge math & puzzles

At what time after 4.00 p.m. is the minutes hand of a clock exactly aligned with the hour hand?

  1. 0.181822916666667

  2. 0.185989583333333

  3. 0.14015625

  4. 0.181765046296296

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The hands align when the minute hand catches up to the hour hand. At 4:00, the hour hand is at 20 minutes. The relative speed is 11/12 minutes per minute. Time = 20 / (11/60) hours? No, 20/(11/12) = 21.818 minutes past 4. 21.818/1440 minutes in a day is 0.18182. The decimal represents the fraction of a 24-hour day.