perplexus.info :: General : Prime clock

Home > General

Prime clock (Posted on 2004-08-01)

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)

Comments: ( Back to comment list | You must be logged in to post comments.)

Two solutions

Comment 17 of 17 |

There are two solutions. In each of these, the numbers from 5 to 10 are reordered.

1 2 3 4 7 10 9 8 5 6 11 12

1 2 3 4 9 10 7 6 5 8 11 12

Posted by K Sengupta on 2024-05-09 00:35:36

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (12)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info