Thanks, must have missed that.
Corrected it now.

The Returnstring has been corrected, but the Visualize portion still says 8E3 is the result.

Its so freaking hard to adjust to this useless spaces after '=' and others...

Thanks for the advice. I hope a loop of 20 ist enough.

Thanks for your tests. I solved this.

Suggest it might be better to put lots of them in a loop instead of just 3 random tests

It looks like your reference solution is always printing your "remainder" part in a field of width 2, but also with a leading space (after the "R").

This means if the remainders are all single digits you are going to get double spaces after "R" instead of single spaces. I doubt this was intentional.

For example. For 273 your solution will give:

273/16=17 R  1
 17/16= 1 R  1
  1/16= 0 R  1
Result=111

instead of (single spaces after "R")

273/16=17 R 1
 17/16= 1 R 1
  1/16= 0 R 1
Result=111

Cases like this are not being tested

.

I included random tests

Thanks, my mistake, have korrekted it

No random tests

Huh? 1000 decimal as hex is 3E8 not 8E3 as in the description/test case