I wanted to be able to read hex numbers better, mostly 0-255, because it is sometimes used in networking and because it's interesting to me right now.

So, here's a little practice system:

Notes:

To count quickly, multiple the first number by 8, then double it. So, 7 x 16 is 7x8=56x2=128, 5x16 is 5x8=40x2=80. I find this overall to be the easiest and fastest.

Each letter adds 9 to its position in the alphabet;

If the first digit is a letter, here's the value:

• F = 240
• E = 224
• D = 208
• C = 192
• B = 176.
• A is "10" so... 160.

Thus, one hex place will always be 240 or less.

A single hex "byte" is TWO digits.