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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: ( You must be logged in to post comments.)
  Subject Author Date
Some ThoughtsProblem SolutionK Sengupta2007-05-04 13:20:00
Solution201987512 ::shrugs::nathan2004-09-14 14:50:24
Solutionre: Hey, you, get offa my cloud (Solution)nathan2004-09-14 14:49:42
Solution?terri2004-08-21 22:27:19
Scratch the Last- Maybe BothEric2004-08-07 23:13:28
Solution???Eric2004-08-07 23:06:33
Solutionsolnneshal2004-08-02 07:05:52
SolutionWrong answerDustin Smith2004-07-31 08:29:43
re: Possible SolutionPenny2004-07-31 07:19:12
SolutionPossible SolutionDustin Smith2004-07-31 02:28:56
re: The solution??saddi Sandy2004-07-30 08:01:03
The solution??Vee-Liem Veefessional2004-07-30 02:14:20
re(2): SolutionsCharlie2004-07-26 10:54:50
re: SolutionsCharlie2004-07-26 10:50:27
SolutionHey, you, get offa my cloud (Solution)Penny2004-07-26 10:10:26
SolutionSolutionsFederico Kereki2004-07-26 07:56:54
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