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169 (Posted on 2004-11-04) Difficulty: 4 of 5
Find all integers 1<=k<=169 for which 169 is not the sum of k nonzero squares.

The squares are not necessarily unique. For example k=5: 169=1+4+4+16+144.

This should be done without a brute force program.

See The Solution Submitted by Brian Smith    
Rating: 2.5000 (2 votes)

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answer Comment 13 of 13 |
The required integers are:

156,159,162,164,165,167,168
  Posted by K Sengupta on 2007-07-28 11:48:51
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