Student or Learner
Roman numbers, like "I,II,III,IV,V,VI,VII,VIII,IX,X,XI,XII...", have their own counting rules. "I" is 1, "V" is 5, and "X" is 10...
Although I know the rules of Roman numbers, not every person in my country know them very well. Maybe many people in my country just know Roman numbers from I(1) to VI(6).
So I just wonder, whether or not Roman numers are so widely and well known in other countries like in America and Britain?