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How many 1s? (Posted on 2004-07-26) Difficulty: 2 of 5
If I took all the numbers from one to one billion:
  1. How many of them contain at least one '1'?
  2. If I wrote them out in one long line, how many 1 digits would there be?

See The Solution Submitted by Thalamus    
Rating: 3.0000 (12 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution??? | Comment 11 of 16 |

1,156,649,252????

 


  Posted by Eric on 2004-08-07 23:06:33
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