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8 points no convex pentagon (Posted on 2009-10-09) Difficulty: 2 of 5
Find a set of 8 points with no three collinear such that no subset of 5 forms a convex pentagon.

See The Solution Submitted by Jer    
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  Subject Author Date
SolutionsolutionCharlie2009-10-09 17:36:41
re: possible real solution (not proven yet) -counterexampleJer2009-10-09 15:32:22
possible real solution (not proven yet)Daniel2009-10-09 13:37:53
possible cheatDaniel2009-10-09 13:21:31
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