Roman Numerals 1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X Optional/Extended Roman Numerals 11 = XI 12 = XII 13 = XIII Modem's Roman Numerals 1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X 11 = XI 12 = XII 13 = XIII 14 = IY 15 = Y 16 = YI 17 = YII 18 = YIII 19 = IZ 20 = Z 21 = ZI 22 = ZII 23 = ZIII (Note that the numerals going above XIII might be used rarley, and also that there is no numerals can exceed, or go beyond ZIII.) -EXTRA- ZIII + II = ZV 2025 = ZZV So... 24 = IZV
