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My clever father (Posted on 2005-06-24) Difficulty: 1 of 5
It is well known that a stopped clock gives the exact time twice a day, while a clock that gains or loses time may not be right more than once over a period of months.

My clever father adjusted his clock to give the correct time at least twice a day, while running at the normal rate.

Assuming he was not able to set it perfectly (a reasonable assumption) how did he do it?

See The Solution Submitted by pcbouhid    
Rating: 2.0000 (2 votes)

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consider the following | Comment 8 of 14 |
Possibly this "clever father person" did absolutely nothing to change the clock. The problem states that the clock shows the correct time at LEAST TWICE A DAY however it does not state that the clock cannot show the correct time always.
  Posted by Jen on 2005-07-11 04:07:30
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