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2 3 1 2 1 3 (Posted on 2004-11-23) Difficulty: 3 of 5

If two 1's, two 2's and two 3's are arranged thus:

2 3 1 2 1 3

then the two 1's enclose 1 other digit, the two 2's enclose 2 other digits, and the two 3's enclose 3 other digits.

Can you find a similar arrangement using the seven pairs 1,1,...7,7?

See The Solution Submitted by Erik O.    
Rating: 4.2857 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts A possible answer Comment 10 of 10 |
The given problem admits of multiple solutions.

One of the possible arrangements is:

1 4 1 5 6 7 4 2 3 5 2 6 3 7

  Posted by K Sengupta on 2007-11-24 05:46:06
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