Clock Needles Overlapping

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?




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Joseph organises an exotic office New year party at the beach to his important fellow employees.

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3. The sales head Clay Vanstone.

4. Clay Vanstone 2 associates.

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They all need to cross a small river to reach the beach, however, Joseph has got just one boat.

There are few rules for crossing the river.

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7. The two girlfriends Carol Vanstone and Tracey Hughes will not stay with the Clay Vanstone without Joseph.

8. No Associates would stay with Joseph without their Clay Vanstone.

9. Mr.Jeremy will not leave the Secret Tab alone.

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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki