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I Intermediate Challenge of the Week #4 04/09/2017

  1. Mar 3, 2017 #1
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  2. jcsd
  3. Apr 7, 2017 #2

    QuantumQuest

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    Find all integers ##n, n > 1## for which the number ##[\frac{1^2 + 2^2 +\cdots+n^2}{n}]^\frac{1}{2}## is integer.
     
  4. Apr 8, 2017 #3

    QuantumQuest

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    Find all integers ##n## for which the number ##[\frac{1^2 + 2^2 +\cdots+n^2}{n}]^\frac{1}{2}## is integer.
     
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