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Rectangle Color Rigor (Posted on 2014-09-23) Difficulty: 3 of 5
Some unit squares on an infinite sheet of squared paper are colored green such that:

Every 2x3 rectangle contains precisely two green squares, and:
Every 3x2 rectangle contains exactly two green squares.

How many green squares are there in a 9x11 rectangle?

*** Based on a Russian Math Olympiad problem.

No Solution Yet Submitted by K Sengupta    
Rating: 3.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionA proofSteve Herman2014-09-23 13:02:11
Solutiona diagramCharlie2014-09-23 12:37:28
re: This seems too easySteve Herman2014-09-23 10:58:35
SolutionThis seems too easyJer2014-09-23 10:10:57
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