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A Black and White Issue (Posted on 2013-06-18) Difficulty: 3 of 5
In a 984 x 984 square grid, each square is colored either white or black. Each black square not on the border has exactly five white squares among its eight neighbors. Each white square not on the border has exactly four black squares among its eight neighbors. How many black squares are there?

No Solution Yet Submitted by Danish Ahmed Khan    
Rating: 1.0000 (2 votes)

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  Subject Author Date
Some ThoughtsAnd more solutions ?Steve Herman2013-06-18 16:53:32
SolutionOther solutions (spoiler)Steve Herman2013-06-18 16:46:33
SolutionsolutionCharlie2013-06-18 16:02:39
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