Binary.
no comment ;;;;
Decimal.
Roman Numerals are essential for simple counting, a universal counting method as well.
There are an infinite amount of numbers
The fifth planet counting outwards from the sun is Jupiter.
an abacus
Binary.
Counting
no comment ;;;;
meteric system
Roman numerals
Babylonians
The Mayans
Decimal.
counting numbers
There really isn't just one formula for card counting. I wouldn't even say its a formula, its more of a system. If you want a basic system for card counting i would Google "hi/low card counting system". That's probly the easiest one to start off with. Good luck man