Puzzle of the day · No. 18 · 30 October
The clock on the square
The tower clock loses 3 minutes a day. At noon today Lucky checked it against his own watch and it was exactly right. In how many days will it show the correct time again?
Answer: in 240 days. A clock with hands shows the right time again once it has fallen behind by exactly 12 hours, a full turn of the dial. 720 minutes at 3 a day is 240 days.
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