Hexadecimal

Hexadecimal is like a different way to count. Normally, we count from 0 to 9, and then start again from 0 once we get to 9. But with hexadecimal, after we count from 0 to 9, we add a letter - A through F. So, it would be like 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F. Then when we get to F, we start again from 0. Hexadecimal is helpful when we are talking about numbers that contain a lot of zeroes and ones, which is how computers talk to each other.