The maximum number of bits sufficient to represent a hexadecimal number in binary:

Number Systems topics include: Positional and non positional number system, decimal and binary number system, octal and hexadecimal number systems. The main number systems used in computer science are: Binary: (base 2) Decimal: (base 10) Octal: (base 8) Hexadecimal: (base 16)  Computers use the binary number system because they are made from binary digital components, or transistors, that work in two states: on and off.  In computing, hexadecimal and octal number systems are used as a compact way to represent binary numbers. Here's some more information about these number... Show more

Number Systems topics include: Positional and non positional number system, decimal and binary number system, octal and hexadecimal number systems.

The main number systems used in computer science are:
Binary: (base 2)
Decimal: (base 10)
Octal: (base 8)
Hexadecimal: (base 16) 

Computers use the binary number system because they are made from binary digital components, or transistors, that work in two states: on and off. 
In computing, hexadecimal and octal number systems are used as a compact way to represent binary numbers.

Here's some more information about these number systems:
Binary: This system works with 0 and 1, and has a base of 2.
Octal: This system uses digits 0–7, along with 8 as the base. It doesn't use the digits 8 and 9.
Decimal: This system uses up to 10 digits, and has a base of 10.
Hexadecimal: This system uses 16 digits and 16 alphabets, and has a base of 16

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