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No big digits involved (Posted on 2017-11-06) Difficulty: 3 of 5
How many decimal integers below 10^20 exist having sum of their digits less than 4?

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionsolutionCharlie2017-11-06 18:04:58
conjecturexdog2017-11-06 17:33:56
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