What is the hexadecimal representation of the decimal number 255?

The decimal number 255 can be converted to its hexadecimal representation by repeatedly dividing by 16 and recording the remainders.

1. Divide 255 by 16:

\( 255 \div 16 = 15 \) with a remainder of \( 15 \).

2. The remainder 15 in hexadecimal is represented by the letter 'F'.
3. The quotient is 15, which is also 'F' in hexadecimal.
4. Reading the remainders from bottom to top (or in this case, the quotient and the last remainder), we get FF.

Therefore, the hexadecimal representation of the decimal number 255 is FF.

Ответ: FF