Nah, no ASCII-Table is needed here. Just convert the binary (base2) to another numeral system (base16 maybe ;)) If you didn’t know it is called base2 becase it has a fixed base and each digit has an incremented exponent like 20 21 23 etc.
Here each nibble (4 bits) represents 1 digit in base16. Should be clear? With 4 digits in base2 you have 24=16 possibilities :D Do I really have to go even deeper?
Ok one little hint: how do you write down figures? Like 1,2,3 etc. Don’t think about ASCII representation, CHARS or STRINGS, just write that numbers down.