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2005 a square? Baseless! (Posted on 2005-05-30) Difficulty: 3 of 5
2005 base 10 is not a square. Neither is 2005 base 7 a square (equal 2*7^3+5=691). Is there any base b such that 2005 base b is a square?

See The Solution Submitted by McWorter    
Rating: 3.6000 (5 votes)

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Some Thoughts radical solution | Comment 5 of 17 |
It works for base = cube root of 10.

Of course, this would be a very strange numerical system.
  Posted by Larry on 2005-05-31 00:12:53
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