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180 is before 90 since, having the same "weight" (9), it comes before as a string.

1 is before 9 as a string (not 'one' before 'nine')

I have a mathematical equation that checks for x and y in one for loop, but still need to pass a loop to solve it...

im using 1 loop and also stuck

The threshold only applies to the initial content value, not the one after the liquid got evaporated.

You should use suggestions for comments which suggest changes to the Kata, not for general questions. Without looking at your code, my assumption is that you create a vector of which increases in size as the value of the argument increases. The solution is to not do that.

Test Failed
cannot allocate vector of size 17.2 Gb

I dont understand why the size is so big. Any suggestions

my python returns true, if i do:
1/5 == 0.2

Because that's how floating point arithmetic work, not only in Python.

Helper question: how much is 1/5 in Python? Hint: its not 0.2.

Kata only works for perfect squares.