I recently gave a new watch to my friend for their birthday.
However, as usual with my presents, it was quite useless as it gains 6 minutes every hour.
I set it using my own accurate clock at midnight and the watch now shows 8.26am.
I know that it stopped 30 minutes ago, so what is the correct time now?
Since the watch is gaining 6 minutes every hour, for every real hour that has passed, the watch will only show 66 minutes. Since the watch shows 8.26am, we know that 506 watch minutes have passed. This, therefore, equals 460 real minutes and hence 7 hours and 40 minutes. The watch stopped 30 minutes ago, therefore the time must now be 8.10am.
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