It's absolutely demotivating when the syhstem tells you that you should be able to do them but you can't and you feel like an idiot, I had to create second account just so I'm not spammed with way too hard katas. I wasted half an hour looking for a way to reset my progress, lower my kyu, ANYTHING to not be stuck just because I accidentaly completed one 6kyu. I logged on this one just to reply, cause I saw email alert.

Oh, but I can. When you click "Kata" on the left side you have filter options and there is "Sort by: Easiest first" or something like this. You can also sort by popularity and it also doesn;t work.

Is there some binary translator that I can use to solve this? I have no idea how to tell what value will something have in binary

How in the hell 9 and one are consecutive numbers? This kata is bs

Wtf, this should be in the description :/

Can someone explain this exercise? How did they get 2 from 10 and and what is even "firstNumber/first_number? We only get firstNumber

And how would that look like?

What is intersection?

Why is this listed as second easiest of all 7 kyu katas when it's absurdly hard, lol

This site is so broken, I sorted 7kyu katas by difficulty and this is supposedly easiest 7kyu kata. I done some of them already and this in is by far the hardest I've seen, I don't have even the slightiest idea how to start, I'm not even sure I understand exercise description :/

I feel extremely stupid now when I look at all this other solutions :|

Why a = d? You can just use d.

I hae no idea what all of this means. ^ is power? like 2.19**1?

@anter69, that didn't help at all. Can you tell me how they get 21 from 39 using this "base 16" (according to wikipedia base 16 is 42, numbers from 0-9 + letters in alphabet). 42-39 is 3, multiplying will only make it go higher so really, hot to get 21 with 39 and 42?