Technically all of the katas from g964 are math problems.
Encountered in the real world have I never any of these math problems, though.
In university, yes, in discrete mathematics and similar but otherwise never.
Especially not in any programming related course or field.

Thanks for your encouragement!

Approved both, thanks!

Thanks a lot for your translation effort!

However, I also don't know much about how translations work here, so could you give some link to your translation?