Decimal
The decimal system utilizes base 10. Decem is the Latin word for 10.
The US system that is based on the number 10 is the base 10 system. In the base 10 system the numbers roll over every 10; example 10,20,30.
The decimal system is based on the number ten.
It is based on the base 10 number system.
Trinary would be the name of a base 3 number system.
Computers are based on a binary number system.
The base 20 number system is called the vigesimal numeral system.
.. octal adj. Of, relating to, or based on the number eight: an octal number ... isthe base-8 number system,
The number system based on thirty is trigesimal, 32 is probably called duotrigesimal.
No, the Roman Numerals are a based less number system.
The metric system
The base-2 (binary) system is simpler than a system based on any higher integer. In a way, it is the simplest possible number system.