please forgive me for asking a noob question but can someone explain me what "slide down" means?

I get "414 should equal 868" for the test (numeric_palindrome(48,9,3,67),868). However when I run my code on my machine I get the right answer.
I have created a list called palindrome which stores all the possible palindromes and my function returns max(palindrome) which is clearly 868.
Any ideas welcome.

There are many tests missing in the kata, the test failures do not have any descriptive message and the description of kata may be better.

My solution say that IP '1e0.1e0.1e0.1e0' is valid but it is not. It should exist a test that validates this.

Instructions should mention it expectes an ip with trailing spaces to fail.

It is a valid IP address, however there is a whitespace character before and/or after the address. You need to check if the whole address is valid and if it has whitespace then it isn't valid. For example: ip = "1.2.3.4 " has a trailing space.

Guys,why is 1.2.3.4 not a valid ip address? I am stuck on this bit.