The Roman numeral system did not include zero and Romans had no concept of it in their arithmetic. Which is one reason why Roman numerals are so clumsy for calculation, though it is possible. They tended to use an abacus for arithmetic and that device does have the concept of zero built in - it is represented by an empty row. read more
Troubleshoot issues with Google Accounts Clear cache & cookies When you use a browser, like Chrome, it saves some information from websites in its cache and cookies. read more