Hexadecimal, 0-9 and A-F, HEX A, 10, Why use HEX, It reduces counting errors with BINARY, It takes up less space and is easier to say, NOTE > Only humans use HEX, a computer uses BINARY!, Denary to HEX, First value = original number / 16, If it is above 9 then becomes a letter, Second Value = Original Number - (FIRST VALUE * 16), If it is above 9 then becomes a letter, HEX to Denary, Split the value in 2, Work out the value of each character on a scale of 8 | 4 | 2 | 1, Combine the 2 lots of binary code, Work out the value in Denary of that code.

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