Try to tackle the bit representation of the numbers and find a pattern that tells you how the strongness of the number increases or decreases.

Yes but somehow it ended being 5kyu.

Yeah, I proposed it be 5 kyu, but in the ended up being 6kyu.

It means dividing by 2 evenly. The "before we reach an odd number" gives it away. I should use the word "evenly" in description so it's more clear.

Where can I ask an admin for rank change?

So is there a way a codewars moderator could change the rank? This isn't a 6 kyu kata at all.

Hey, how is the rang of the kata decided?

I think this kata should be 5yu

Yes, I think this kata should be 5 kyu.

Thank you, approved.

Can you please re-fork the kata and re-submit the translation?

I can't approve the translation right now, Codewars won't let me because of the merging problem with the Description part of the kata.

Also, what do you think about the rank of the kata? Is 5 kyu good enough?

Oh, I think it's not a problem.

Thank you for the suggestions.

I made the solution private in Java and C#, also added another fixed test case and 100 random test cases like you mentioned.

What do you mean about the test cases for C++? Evey language has the same test cases.

Ah, thank you again.

What methods should I make private in general in the test code?