There are four levels to play, each divided into three stages. You start by learning the home row keys. Each stage builds on previous lessons, introducing new letters as you progress and giving ...

Hexadecimal close hexadecimalA number system using 16 symbols from 0-9 and A-F, also known as base 16 and hex., also known as hex, is the third commonly used number system. It has 16 units - 0-9 ...