the hex number system (hexdecimal) uses base16 numbers
0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
1=1
A=10
F=15
FA = (15*16 + 10)
BFA = (11*16*16 + 15*16 + 10)
and so on.
each digit is 4 bits.
most numbers in games uses either 8, 16 or 32 bits
the skill and attribute numbers in M&B are most likely 8bits so if you want to change your strenght for example do like this.
search the savefile for all numbers that match your strength and note their positions
play the game until you gain a level and increase strength by one.
search the previously noted positions for the new strength
repeat until you only have 1-4 possible positions for the strength number (try changing them one at the time until you find the right one).
(that process works with almost all games)