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Point to 2013 (Posted on 2013-01-09) Difficulty: 3 of 5
Determine the minimum value of a positive integer N such that the 2nd, 3rd, 4th and 5th digits in order immediately following the decimal point (reading left to right) in the base ten expansion of √N is 2013.

*** For an extra challenge, solve this puzzle without using a computer program.

No Solution Yet Submitted by K Sengupta    
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re(2): No Subject - wrong key -revisit | Comment 6 of 7 |
(In reply to re: No Subject - wrong key by brianjn)

I went back to the Excel spreadsheet.

Likely I could have written the formulae better (ie, carry to the next column), I won't elaborate, but the best I could arrive at with the method offered was:
and that met my intention for ".9999"
The result rounds to 4532 which is shown by the computer results.

  Posted by brianjn on 2013-01-09 22:04:42

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