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Last Four Digits (Posted on 2024-04-17) Difficulty: 4 of 5
Consider the sum 1^99 + 2^99 + 3^99 + ... + 99^99.
Finding the last digit of this sum was the task of an old problem Last Digit. With a clever setup finding the last two digits was just as easy.

So I present a higher challenge: find the last four digits. No computer programs!

No Solution Yet Submitted by Brian Smith    
Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnalytic solution with computer verificationLarry2024-04-17 08:25:46
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