Challenge #406: What Is Your Lucky Number for the New Year?

[MilindGadhia]

solution attached

lucky number 7

[m-wolters]

My solution

Spoiler

 

[JasperMB]

Spoiler

 

[Pilsner]

Another great challenge. My lucky number was 6, here's my solution:

Spoiler

 During the verification task, I found a couple of numbers that instead reached 0 but most went to Kaprekar's constant. My macro tools are in the container:

 

[aatalai]

C406 enjoyed that been a while since I've needed to do a nested macro

[danbostrom]

One of my favorites! I went with the 'discard leading zeroes' option detailed here so there are a few values that don't converge but they're consistent with the ones listed in the article

[steven_quehan]

Not as easy as it looks!