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Latin Colors (Posted on 2011-10-26) Difficulty: 2 of 5
A 5x5 grid has been colored in such a way that any group of cells consisting of a cell and its two, three or four neighboring cells has each of its cells being of a different color. This has been done in such a way as to use the minimum possible number of colors that will accomplish that. Two of the red cells have been shown in the diagram below. Which of the other numbered cells are also red?

1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25

See The Solution Submitted by Charlie    
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  Subject Author Date
All possible arrangementsSteve Herman2011-10-26 20:20:55
SolutionsolutionDej Mar2011-10-26 14:59:22
Some ThoughtsIt's Greek to me (spoiler)Steve Herman2011-10-26 14:20:11
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