How do hexadecimal numbers or whatever work?

[Peegee]

You know how you count in base 10 (10, 100, 1000)

well in Hex you count in base 16 (16 , 32, 48, 64, etc)

ok?

Since there's no 16 since digits (0123456789) they have to add alphabets (0123456789ABCDEF)

So that's how hex works.