Riddle: You have the misfortune to own an unreliable clock. This one loses exactly 24 minutes every hour. It is now showing 3:00am and you know that is was correct at midnight, when you set it. The clock stopped 1 hour ago, what is the correct time now?
Answer:
6:00am: since the clock is losing 24 minutes every hour, for every real hour that has passed, the clock will only show 36 minutes. Since the clock shows 3:00am, we know that 180 clock minutes have passed. This therefore equals 300 real minutes and hence 5 hours. The clock stopped 1 hour ago and the time must now be 6.00am. QED.
6:00am: since the clock is losing 24 minutes every hour, for every real hour that has passed, the clock will only show 36 minutes. Since the clock shows 3:00am, we know that 180 clock minutes have passed. This therefore equals 300 real minutes and hence 5 hours. The clock stopped 1 hour ago and the time must now be 6.00am. QED.
Share:
10 Best Riddles For Kids are hand picked 10 Best Riddles For Kids for use by teachers in the classroom and for home school lessons. This 10 best riddles for kids quiz provides the option to be downloaded as a PDF or printable directly from the 10 Best Riddles For Kids quiz page.
Thanksgiving Riddles are hand picked Thanksgiving Riddles for use by teachers in the classroom and for home school lessons. This thanksgiving riddles quiz provides the option to be downloaded as a PDF or printable directly from the Thanksgiving Riddles quiz page.
Christmas Riddles are hand picked Christmas Riddles for use by teachers in the classroom and for home school lessons. This christmas riddles quiz provides the option to be downloaded as a PDF or printable directly from the Christmas Riddles quiz page.
