How do you find random test scenerio? I have problem with one and I cannot solve it.

I like the way you calculated years and so on.

I like this solution the most. It's clear.

I like that solution with using boolean, very nice :)

Just keep trying to simplify your goal. Be as general as possible. What data type should every element of the string be?

Why there is question mark ? instead of e.g. 'A', like ('T', '?')?

The closing quote is in the next line, so the char isn't a literal whitespace.

:)

Hi, i don't understand this fail test:

ValidatePin should return false in various edge cases
Test Failed
Wrong output for "123
"
Expected: False
But was: True

Ok, there shouldn't be whitespace in pin so put that condition : pin.Contains(" ") ? false, nut it's not working! Why it is so?