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Thirteenth power (Posted on 2013-01-12) Difficulty: 4 of 5
The number 21982145917308330487013369 is the thirteenth power of a natural number. Find the number using just pen and paper.

No Solution Yet Submitted by Danish Ahmed Khan    
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Some Thoughts re(3): why d1 .?...spoiler | Comment 5 of 7 |
(In reply to re(2): why d1 .?...spoiler by Charlie)

Reading all the comments  & taking into account that difficulty degree should be somehow defined, I still believe that the problem is solvable eiasily,however some math. background 
is a must.

D1 WAS MY CHOICE , but i would not object to d2.

D4? - compare with other posts ih this class ...

  Posted by Ady TZIDON on 2013-01-12 15:31:32
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