The numbering system with a radix of 16 is more commonly referred to as
Explanation
The numbering system with a radix of 16 is more commonly referred to as hexadecimal because it uses sixteen distinct symbols to represent numerical values. These symbols include the digits 0-9 and the letters A-F, where A represents the value 10, B represents 11, and so on till F represents 15. Hexadecimal is widely used in computer science and digital systems due to its direct relationship with binary representation, as four hexadecimal digits can represent a single byte (8 bits). It is particularly useful for representing memory addresses, colors in graphics, and encoding and decoding data.