What represents a unit or quantity in the hex system?

In the hexadecimal (hex) system, which is a base-16 number system, the representation of values includes the digits 0 through 9 and the letters A through F corresponding to decimal values 10 through 15. Each digit in the hex system represents a power of 16, similar to how each digit in the decimal system represents a power of 10.

When we refer to how units or quantities are represented in the hex system, it is fundamentally through numbers, as they signify specific values. This can include both the numerical digits and the letters that are treated as part of the number system for representing larger quantities. Therefore, the term that best captures the essence of a unit or quantity in the hex system is "number." It signifies that each character—whether it be a numeral or a letter—affects the value and interpretation of the overall number being represented.