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Ones or twos (Posted on 2011-12-07) Difficulty: 2 of 5
In a list of first 1,000,000,000 natural numbers each number is replaced by its digital root.
We get 1,000,000,000 one-digit numbers.

Are there more 1's or 2's ?

No Solution Yet Submitted by Ady TZIDON    
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re(2): Depends what natural numbers are. | Comment 3 of 4 |
(In reply to re: Depends what natural numbers are. by Charlie)

Of course.  I was thinking 999,999,999 (mod 9) = 0 which is the only time digital root is not the same as mod 9.  I'll fix it.
  Posted by Jer on 2011-12-07 13:46:59

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