Who used the Roman number system?
Asked in Roman Numerals, Numbers
Why do the Roman numerals use letters instead of Arabic numbers?
If the Roman had used the same numbers which are used in the Arabic number system then they would have been using the Arabic number system. The whole point is that they used a different system. The other half of the whole point is that the Roman empire fell before the Arabs and Hindus developed their number system. The Romans 'borrowed' their system from the Etruscans; they could not borrow what had not yet been invented.