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Triangular Ring (Posted on 2008-01-09) Difficulty: 3 of 5
Each of the triangular numbers that are below 1000 is written on a separate card. Some of these cards are then placed in a circle so that, viewed from the center, the right-hand digit of each card matches the left-hand digit of the card to its right. No tricks are used such as turning a card upside-down.

What's the maximum number of digits that can appear on such a subset of the cards?

See The Solution Submitted by Charlie    
Rating: 2.6667 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): trying to do better | Comment 4 of 9 |
(In reply to re: trying to do better by Charlie)

true
  Posted by Ady TZIDON on 2008-01-10 00:10:25

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