# CCNA 200-125 And CCENT 100-105 Drill: Hexadecimal Conversions

Converting hexadecimal to decimal and / or binary values has to be second nature for you on exam day — and to help you realize that level of CCENT and CCNA exam success, I’m posting several hex conversion drills for you this week.

If you have any questions about the answers posted here, or want to make a suggestion regarding future practice exams, tweet me directly  @ccie12933.

Let’s get started by converting this series of hex characters to decimal!

A7

B2

17

20a

f3

102

9d

Let’s check the answers and how we got there after this brief review of the letters you’ll see in hex values:

A = 10, B = 11, C = 12, D = 13, E = 14, F = 15.

The case of the letter does not matter.  “A” and “a” represent the same value.

I told you it was brief!  : )   Let’s check the answers…

A7 represents 10 units of 16 and 7 units of 1.  160 + 7 = 167.

B2 represents 11 units of 16 and 2 units of 1.   176 + 2 = 178.

17 is representing 1 unit of 16 and 7 units of 1.  16  + 7 = 23.

20a represents 2 units of 256, 0 units of 16, and 10 units of 1.  512 + 10 = 522.

f3 represents 15 units of 16 and 3 units of 1.  240 + 3 = 243.

102 represents 1 unit of 256,  0 units of 16, and 2 units of 1.   256 + 2 = 258.

9d represents 9 units of 16 and 13 units of 1.  144 + 13 = 157.

Nice work!    I’ll link to other hex conversion drills as I post them this week and next (first two weeks of March 2018).   While you’re here, check out my CCNA YouTube Channel, and I’ll see you tomorrow with a new drill!