¿Qué es la constante de Kaprekar?
https://www.youtube.com/watch?v=8R88cASJWhU
If you are not happy with the results below please do another search
https://www.youtube.com/watch?v=8R88cASJWhU
https://www.youtube.com/watch?v=lzbioe3bfbc&t=56s
https://www.youtube.com/watch?v=QIMgE7L-5D0&feature=youtu.be
https://www.youtube.com/watch?v=hDXMZdX79Mo
https://www.youtube.com/watch?v=xStCLe0vMSg
https://www.youtube.com/watch?v=eBnJjrCuv0Y
https://www.youtube.com/watch?v=_fe3eIxlye4&t=1s
https://www.youtube.com/watch?v=AjxB1HmvFt8&t=17s
https://www.youtube.com/watch?v=e7kOkctJs3c&feature=youtu.be
https://www.youtube.com/watch?v=a359vdU67cw&feature=youtu.be
https://vimeo.com/214319319
https://www.youtube.com/watch?v=9VUPpGYaKoA&app=desktop
https://www.youtube.com/watch?v=y2PjHI3hqiA&feature=youtu.be
https://www.youtube.com/watch?v=7xNKx0fIePM&feature=youtu.be
https://www.youtube.com/watch?v=oqNoRd9m-_s&t=10s
https://www.youtube.com/watch?v=cbj8UC5CgOs&feature=youtu.be
https://www.youtube.com/watch?v=zg4frHePQ-I&t=21s
https://www.youtube.com/watch?v=3Ts10ylly1M&feature=youtu.be