A good answer might be:

A (base 16)   =   10 (base 10)   =   1010 (base 2)

Repn in Base Sixteen, Ten, and Two

Here is a chart that shows integers zero through fifteen and their positional representation using base sixteen, ten, and two. For example, 01102   =   22 + 21   =   6ten   =   6sixteen

Repn in
base sixteen		Repn in
base ten		Repn in
base two		 Repn in
base sixteen		Repn in
base ten		Repn in
base two
0 0 0000 8 8 1000
1 1 0001 9 9 1001
2 2 0010 A 10 1010
3 3 0011 B 11 1011
4 4 0100 C 12 1100
5 5 0101 D 13 1101
6 6 0110 E 14 1110
7 7 0111 F 15 1111

QUESTION 11:

What is the name of this pattern of four bits, using the pattern naming scheme: 1010 ?