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Losing Time

Math brain teasers require computations to solve.


Puzzle ID:#4144
Fun:*** (2.22)
Difficulty:** (1.9)
Submitted By:librashorty***
Corrected By:MarcM1098




I was recently given a new watch for my birthday. However, as usual with my presents, it was quite useless as it loses 6 minutes every hour. I set it using my friend's accurate watch at midnight and it now shows 10:39am. I know that the watch stopped 21 minutes ago so what is the correct time now?

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(user deleted)
May 23, 2002

Well Done!
Dec 21, 2008

Nice puzzle. I got this one wrong
I went the wrong way with my 6 minutes, thinking that when the watch showed 10am it was actually 16. Therefore, showing 100 made it 110 and the 39 minutes was nearly 4 minutes out making it 11:43ish then add the 21 minutes to make it nearly 124.

I should have twigged I was wrong when it wasn't a nice neat answer with rounded numbers, as all math problems seem to be ;)
May 04, 2009

it loses 1/10 th of passing time. Therefore 10:39 is 9/10 ths. Dividing by 9 gives 1:11 to add to the 10:39 making 11:50. Just add 21 min. Voila!

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