What is XIX?

Answer 1

19 in roman mumerals
These are Roman numerals. The Romans, in the time of their empire, used letters to represent numbers. I was 1, V 5, X 10, L 50, C 100, D 500, and M 1000.

By combining these letters they could make any number. The numbers 1 to 10 would be I, II, III, IV, V, VI, VII, VIII, IX, X. A lower number before a higher number meant that that number was subtracted from the higher number. So X is 10, IX is one before ten, is ten minus 1 is 9.

XIX, is ten and one less than ten, so it is ten and nine, or nineteen.