How to use roman numerals<br>Understand the concept of roman numerals. Roman numerals use fewer symbols than the number system you are used to. I is the number 1 (one), v is 5 (five), and x is 10 (ten), for example.
Can we infer the following?
Roman numerals are used in other countries too 

OPT: 1. Yes 2. It's impossible to say 3. No
The answer is:
2.