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by Brian Gladman on September 22, 2013

Sunday Times Teaser 2661 – Three Clocks

by John Owen

I have three 24 hour digital clocks that each give time as ‘hhmm’. One is accurate but the other two respectively gain and lose time at the same rate which is less than a minute per day. I set the inaccurate clocks to the correct time (simultaneously) once every six months.

I noticed recently that all three clocks were displaying the same four digits in a different order and that the fast clock had no digits in their correct positions.

What was the correct time at this moment?

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