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Short and sweet (Posted on 2011-02-21) Difficulty: 3 of 5
Let n be any natural number whose square is also the difference between two consecutive cubes.

Prove that 2n-1 is also a square.

See The Solution Submitted by broll    
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re(2): spoiler Comment 4 of 4 |
(In reply to re: spoiler by Ady TZIDON)

Does anyone have any comments on the solution before I publish it?
  Posted by broll on 2011-02-25 09:01:26

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