The default counting system, also known as the base-10 system.
The base-16 system. Color codes are usually in hexadecimal format.
The base-2 system, how computers count.
The base-36 system, a weird system to count in.
The base-64 system, a weirder and impossible system to count in.
📄️ Roman numerals
The roman numeral system using the letters I, V, X, L, C, D and M.
📄️ Math equations
Count with math equations to train your brian.