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## What's the Correct Time?

Math brain teasers require computations to solve.

 Puzzle ID: #29353 Fun: (2.71) Difficulty: (2.25) Category: Math Submitted By: Draw Corrected By: boodler

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 8:26 am. I know that it stopped 30 minutes ago, so what is the correct time now?

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 doghouse270 Mar 27, 2006 didn't get it but was cool anyway AZTTT Mar 27, 2006 That was fun, thanks! good one! It can also be solved by adding the new watch's equivalent of 30 minutes (33) to the NW time and solving for a current NW 'time' of 8:59. OldChinaHand Mar 27, 2006 It took a while but it worked out. Good one. zonarita Apr 19, 2006 Draw I don't usually like, or even do, the math teasers. This one was fun and you did a very good job explaining to us non math people how to get the right answer - thanks! RRAMMOHAN Jun 03, 2006 Nice and interesting. Got it! javaguru Jan 27, 2009 To make the solution a bit clearer for others: the watch is running at 66/60 = 11/10 normal speed, so 10/11 * 506 = 460 minutes passed while the watch was running. Add the 30 minutes and you see that it is 506 - (460 + 30) = 16 minutes earlier than the watch shows.