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SOD (Posted on 2008-07-09) Difficulty: 3 of 5
Denote "sod(x)" as sum of the digits of x. Examples: sod(49) = 4 + 9 = 13; sod(123) = 1 + 2 + 3 = 6.

Find sod(sod(sod(4444^4444))).

See The Solution Submitted by pcbouhid    
Rating: 4.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolutionDej Mar2008-07-09 21:27:18
SolutionSolutionK Sengupta2008-07-09 11:37:01
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