Ok I get it now, thanks for the heads up

There are currently no basic tests in Ruby (consequence of an update), it has been pointed out in several issues.

I mean for example a code with only return new List<int>(){2,3,4,5,6};. You'll never get a message telling you there's more than one mismatch.

Yeah sorry I did fixed the comment right after I posted it with the language I'm using at the top!

Not sure I understood what you mean, returning the same list where?

Please say which language you're using (I guess it's C#). Consider the tests will only return you the first element mismatched in case of a bad answer. Try returning always the same list and you'll see.

Good morning to me! :D So I didn't realised about the parentheses on i+1, in that form it uses to pwr the i not the i+1. Solved thanks.

I think initially I had something like : tot + (Number(v) ** i+1) in the reduce method. I don't understand why this doesn't work. I'm pretty sure it's my bad anyway :P

Probably a problem with operators precedence, I just tried your code and it worked changing pow with **.

something was weird about the Exponentiation( ** ) while trying to solve this.
When I used math.Pow() my solution worked but when I used Exponentiation it gave me the same result over and over again. For example I used the expo( ** ) for power 1 and I got answer 2 no matter what number I had, like 5 ** 1 = 2, 6 ** 1 = 2. Then after a long time of trying to figure out, I just changed to math.Pow(5, 1) = 5 and there you go...
Was it something wrong I did? Or it just doesn't work to be used this way?

Ok thanks! Im quite new here and was the first question, I wasnt even sure what I wanted to ask!

I was using wrongly the function String.IndexOf, I was getting the same number if there were two equal digits and the Pow function I made was spitting out random numbers! I figured it out at the end, thanks anyway!

p.s. I forget everyone is using a different code! I'll keep that in mind

Depending on the language you can have some limitations, but I don't think it's the problem here. It's hard to help you without more informations! Ask a precise question (actually you don't even ask one!), say which language, which cases, etc. And maybe you may post your code (with a spoiler flag) if you cannot get out of it. Also,see if this may help: https://docs.codewars.com/training/troubleshooting.

my code works just fine with normal tests, but with random tests my final array only gets to 1306? looks like it cant workout higher numbers