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It is not 8^5 (Posted on 2015-06-24) Difficulty: 2 of 5
In decimal representation find the largest N-digit number which is an N-th power.

  Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)
Solution: (Hide)
It is 9^N for N=1,2,3,...21
The biggest is 9^21 =109418989131512359209 (a 21-digit number)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solution8^5Math Man2015-06-25 08:34:46
Solutionre: Solution (Spoiler)Charlie2015-06-24 09:48:19
SolutionSolution (Spoiler)broll2015-06-24 08:45:20
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