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Self-Referential Numbers (Posted on 2005-09-23) Difficulty: 3 of 5
A nine digit number has the property where the first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, the third digit equals the number of twos and threes used in the number, etc. through the ninth digit equals the number of eights and nines used in the number. What could the number be?

A ten digit number has a similar property to the nine digit number. The first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, etc. through the ninth digit. And also, the tenth digit equals the number of zeros and nines used in the number. What could this number be?

See The Solution Submitted by Brian Smith    
Rating: 3.4000 (5 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(5): Attn: Ken HaleyKen Haley2005-09-25 05:16:06
re(4): Attn: Ken HaleyPenny2005-09-25 02:17:36
re(3): Attn: Ken HaleyKen Haley2005-09-24 21:30:38
re(2): Attn: Ken HaleyKen Haley2005-09-24 21:15:23
Another computer programTristan2005-09-24 21:13:16
re(3): Attn: Ken HaleyCharlie2005-09-24 16:06:47
re(2): Attn: Ken HaleyCharlie2005-09-24 15:44:53
SolutionIterationgoFish2005-09-24 13:11:24
re: Attn: Ken HaleyPenny2005-09-24 12:20:58
Attn: Ken HaleyPenny2005-09-24 11:42:59
re(2): Computer program solutionPenny2005-09-24 09:26:05
Solutionre: Computer program solutionKen Haley2005-09-24 06:31:59
Non-methodSteve Herman2005-09-24 00:12:03
re: Solution & methodCharlie2005-09-23 20:00:41
Solutioncomputer solutionCharlie2005-09-23 19:44:37
SolutionComputer program solutionPenny2005-09-23 19:36:29
SolutionSolution & methodAvin2005-09-23 18:57:52
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