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A Digital Root Problem (Posted on 2006-06-29) Difficulty: 2 of 5
The digital root of a number is obtained by summing its digits and then repeating the process (summing the sum's digits) until the answer is a single digit number. For example, the digital root of 7368 is 6.

Determine the digital root of (97240+38)8457

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (2 votes)

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Difficulty | Comment 5 of 10 |
I don't undersatand how this was given a difficulty rating of 2 despite my sugestion that it is harder. I can't imagine many nonprofessional mathematicians could answer this?
  Posted by Sir Percivale on 2006-06-29 18:21:01
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