Question

What does the hexadecimal number 2D represent in the binary system?

A. 111000
B. 101010
C. 101101
D. 110011
E. 100111

Answer 1

every digit of a hex number is converted to 4 binary digits.
hex digits are { 0, 1, 2, .., A, B, .., F }.

2 in hex is equal to 0010 in binary.
D is equal to 1101.

so the answer is 00101101 or C.