1-32Base (Radix)The base, or radix, of this system is 16, which represents the number of symbols used in the system.A quantity expressed in hex will be annotated by the subscript 16, as shown below:A3EF_{16}Positional NotationLike the binary, octal, and decimal systems, the hex system is a positional notation system. Powersof 16 are used for the positional values of a number. The following bar graph shows the positions:16^{3} 16^{2} 16^{1} 16^{0}-116^{-2} 16^{-3}Multiplying the base times itself the number of times indicated by the exponent will show theequivalent decimal value: