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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: ( You must be logged in to post comments.)
  Subject Author Date
answerK Sengupta2008-02-06 06:20:35
SolutionGeneral Method & Characterisation of All Optimal SolutionFrankM2008-01-15 11:58:46
No Subjectbrianjn2008-01-12 01:58:25
SolutionA New Ringbrianjn2008-01-10 07:44:10
SolutionSolutionDej Mar2008-01-10 05:45:11
re(2): trying to do betterAdy TZIDON2008-01-10 00:10:25
re: trying to do betterCharlie2008-01-10 00:08:18
Solutiontrying to do betterAdy TZIDON2008-01-09 22:41:30
One Ringbrianjn2008-01-09 21:23:30
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