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Less than 100 (Posted on 2021-02-14) Difficulty: 2 of 5
Pick up at random a 3-digit number and decrease it by the sum of its digits.
Clearly,applying this procedure again and again you will hit zero no matter how big your initial number was .
How many iterations at most are needed and how many numbers cause it?

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (1 votes)

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  Subject Author Date
related OEIS entryJer2021-02-14 09:43:40
Solutioncomputer solutionCharlie2021-02-14 08:59:24
SolutionSolutionLarry2021-02-14 08:12:05
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