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Repunit Rigor II (Posted on 2013-10-01) Difficulty: 3 of 5
sod(n) denotes the sum of the digits of a base ten positive integer n, and:
Rt = 11...11 (the digit 1 repeated precisely t times.)

Determine the values of t for which:
sod(Rt2) = (sod(Rt))2

No Solution Yet Submitted by K Sengupta    
Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution Answers Comment 3 of 3 |
1, 2, 3, 4, 5, 6, 7, 8, 9


  Posted by Math Man on 2013-10-05 23:45:50
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