What type of number system uses ten different digits (0-9)?

The decimal number system, also known as base 10, uses ten different digits ranging from 0 to 9. This system is the most common number system used in everyday life and in most mathematical calculations. Each digit in the decimal system contributes to the value of a number based on its position, with each position representing a power of ten. For example, in the number 345, the 3 represents 3 hundreds (3 x 10^2), the 4 represents 4 tens (4 x 10^1), and the 5 represents 5 units (5 x 10^0).

In contrast, other systems like binary use only two digits (0 and 1), hexadecimal employs sixteen digits (0-9 and A-F), and octal relies on eight digits (0-7). Each of these systems serves specific purposes in computing and mathematics but is not based on the ten digits of the decimal system.