What is the decimal number 249 in base 16?

The number 249 in hexadecimal would be F9.

The digits in base 16 correspond to powers of 16 rather than 10.

For a two-digit number, the place values are 16 and 1, and the usable values are from 0 to 15, with values 10 through 15 represented by letters A (10) through F (15).

F9 = (15x16) + (9x1) = 240 + 9