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Puzzle ZDJB 

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At midnight at the start of Monday, January 1st, Professor Stone set two old-fashioned clocks to the correct time.

One clock gains one minute every hour and the other loses two minutes every hour.

When will the clocks next show the same time as each other?
When will the clocks both show the correct time?

Puzzle Copyright © Kevin Stone

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The answer occurs on the hour.


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