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Magic Keyring (Posted on 2005-03-28) Difficulty: 3 of 5

Engrave numbers on 5 keys on a circular keyring so that the numbers on adjacent groups of keys sum to any value between 1 and 21 inclusively.

For example, 1,1,3,6,6 can sum up to any number between 1 and 17 (1=1, 1+1=2, 3=3, 3+1=4, 3+1+1=5, 6=6, 6+1=7, 6+1+1=8, 6+3=9, 6+3+1=10, etc).

See The Solution Submitted by Erik O.    
Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Question Queries relating to an unsolved problem Comment 6 of 6 |

Edited on March 15, 2008, 3:19 am
  Posted by K Sengupta on 2005-11-14 01:50:04

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