A clock loses exactly two minutes every single hour. If the clock is set to the correct time at midnight on Monday, how many total hours will pass on standard wall clocks before this faulty clock displays the exact correct time again?
360 hours
To show the correct time again, a clock must lose a full 12 hours (720 minutes). Since it loses 2 minutes every hour, it takes 720 / 2 = 360 hours for the clock to wrap around and match reality again.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Hard. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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