In PHP, assuming the kata aims for strict comparison, it needs to add a fixed test like:

function a(){};
$a = ["a", 1, false];
$b = [0, true, a(), "b"];

That would invalidate some solutions (mine included x_x) that uses built-in functions with non-strict comparison.

Ruby 3.0 should be enabled.

CoffeeScript translation

099 xxx xx xx - MTS Test [Just return "MTS"]

This is inconsistent across the languages (this is not tested in the original language, but it was written together with the original language).

This requirement doesn't explain what should be returned (so is it "MTS Test" or "MTS" after all?), and looks like Giacomo is too lazy to clean up the mess he's made with his terrible translations...

Python and Ruby: the number of tests is so small some inputs may not be generated at all.

Python version expects "MTS" for numbers starting with 099.

Ruby version expects "MTS" for numbers starting with 099.

Sorry but such an example has been attached before - try to add some extra options.

@donaldsebleung

Please, your anti-cheat is a black box that nobody knows how it works.

Dont work correctly in Java

Too simple even for an 8 kyu. I would add some edge cases like negative prices for example.

static keyword is missing in the method declaration and you are giving the answer to the people.

JavaScript version needs random test cases