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Prime clock (Posted on 2004-08-01) Difficulty: 3 of 5
Given a clock, rearrange six consecutive numbers on its face, so the sum of every pair of adjacent numbers is a prime.

See The Solution Submitted by Federico Kereki    
Rating: 3.7500 (8 votes)

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A question.... | Comment 8 of 16 |
Must the sum of the first with the last one be a prime?

If not I have the solution:   11 12 1 2 3 4

  Posted by Isabel on 2004-08-02 03:57:55
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