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Odd Digits 2 Differ Adjacently (Posted on 2008-09-22) Difficulty: 3 of 5
Consider all possible 1000 digit positive base 10 integers all of whose digits are odd. For how many of these integers, do each pair of adjacent digits differ precisely by 2 ?

Note: Try to solve this problem analytically, although computer program/ spreadsheet solutions are welcome.

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

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  Subject Author Date
SolutionSolutionPraneeth2008-10-07 07:17:48
re: SolutionCharlie2008-09-23 10:33:15
SolutionSolutionDej Mar2008-09-23 02:58:22
Solutionre: computer-aided solutionCharlie2008-09-22 17:47:13
Solutioncomputer-aided solutionCharlie2008-09-22 15:00:34
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