The decimal system was invented by the Mesopotamians.
The decimal system was invented by the Mesopotamians.
The decimal system is an invention of the Mesopotamians .
The decimal system is an invention of the Mesopotamians .
The decimal system has been invented by the Mesopotamians.
The decimal system has been invented by the Mesopotamians.
The decimal system is invented by the Mesopotamians.
The decimal system is invented by the Mesopotamians.
Correct Answer:
The decimal system was invented by the Mesopotamians.
The decimal system was invented by the Mesopotamians.