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"Square,Square; Which Color?"

A square tabletop measures 3n × 3n. Each unit square is either red or blue. Each red square that doesn’t lie at the edge of the table has exactly five blue squares among its eight neighbors. Each blue square that doesn’t lie at the edge of the table has exactly four red squares among its eight neighbors. How many squares of each color make up the tabletop?


"Square,Square; Which Color?"


Here is correct way to count those!


This post first appeared on Spirit Of Genius, please read the originial post: here

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"Square,Square; Which Color?"

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