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Kaprekar's routine
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==External links== {{commons category|Kaprekar's constant}} * {{cite web|last=Bowley|first=Roger|title=6174 is Kaprekar's Constant|url=https://www.numberphile.com/videos/6174|work=Numberphile|date=5 December 2011 |publisher=[[Brady Haran]]|location=[[University of Nottingham]]|access-date=2024-01-17}} * [https://www.youtube.com/watch?v=d8TRcZklX_Q Working link to YouTube] * [http://www.panix.com/~baldwin/kaprekar.pl Sample (Perl) code to walk any four-digit number to Kaprekar's Constant] * [http://www.panix.com/~baldwin/kaprekar.py Sample (Python) code to walk any four-digit number to Kaprekar's Constant] {{Classes of natural numbers}} [[Category:Arithmetic dynamics]] [[Category:Base-dependent integer sequences]] [[Category:Sorting algorithms]]
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