SOLUTION: How do I know if it's roman numeral 6 or roman numeral 4

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Question 284530: How do I know if it's roman numeral 6 or roman numeral 4
Found 2 solutions by id10, Alan3354:
Answer by id10(2) About Me  (Show Source):
You can put this solution on YOUR website!
if v=5
iv=4
vi=6
if v is in front of the second numeral than it is greater than 5

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How do you know if WHAT is 6 or 4?
Maybe it's 10.