The Roman numeral XVIII represents the number 18
No, the Arabic numeral system is the one used in most countries of the world and it based on the numbers; 1, 2, 3, 4 ,5, 6, 7, 8, 9 and 0. The numbers have place values based on multiples of 10. The...
MDCXVII = 1617
D = 500, X = 10, V = 5 & I = 1 so... the equivalent is 534
50 + 10 +(10-1) = 69