How to vocalize hexadecimal numbers?
The best way is to read out the digits and then say "hex(adecimal)". Don't say "forty-one hex" because "forty" means four times ten, whereas the four in 41h stands for four times sixteen. Don't say "sixty-five in hex" because then the person you're talking to doesn't know if you mean "The decimal number sixty-five, only written out in hex, i.e., four-one-hex" or "The number six-five-hex, i.e., one hundred and five decimal."