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Painted Sphere (Posted on 2007-02-13) Difficulty: 3 of 5
A sphere is painted black and white. Show that there are 3 equidistant points of the same color.

No Solution Yet Submitted by Art M    
Rating: 4.0000 (1 votes)

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re(2): Solution | Comment 8 of 9 |
(In reply to re: Solution by Bractals)

Let the five unpainted vertices adjacent to the five black vertices that are painted white be called b1, b2, b3, b4, b5.

Then A and b1, b3 are all white.  Same with A, b2, b4; or A, b3, b5.

Likewise with the last, black vertex and a1, a3, etc.

  Posted by Charlie on 2007-02-14 14:21:18

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