Fixed order of expected and actual and removed the test case for null.

Expected and actual results are swapped in the error message of a couple of tests in C#.

You are missing a few ASCII characters with this replace (there are 6 characters between 'Z' and 'a')

Sorry, not a kata issue; your code is wrong. BTW before posting issues look at the top of the page: 16363 people passed the JS kata. When this number is high, chances are high that your code has flaws. You should look at https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution. Cheers.

Sorry no errors in the tests.
BTW if you post an issue:

• before that look at how many people passed the kata...
• give the input and the result of the failed test(s)

Cheers.

lua - basic tests are broken

• No need to post several times:-)
• Sorry, your code is wrong somewhere; there are no errors in the tests. BTW before posting issues look at the top of the page to see how many people passed the kata. If this number is high chances are that your code has some flaws.

Cheers.

Powersell - Some test case is broken - I verified all test cases (logging them and comparing the values) and all falses are indeed false, yet one of them expects true

Since I can't see your solution, I'm going to guess with most common things:

1. Limit your loops, eg. if the current sum is already bigger than desired stop iterating, don't start from 1 or 0 but from previous digit
2. Take anything that is not necessary outside the loops
3. Maybe try rearanging the loops (here point 1 might make a big difference)