Ah, it looks like you're trying to write the Roman numeral for 9 and 21. That would be IX and XXI. Isn't it wonderful how numbers can be expressed in different ways? Just like how we can paint the same landscape using different colors and techniques.
September is the ninth month. 9 is IX. 21 is XXI. It would be written as IX-XXI
September 21, 2013 can be written in Roman numerals as "XXI-IX-MMXIII".
IX-XXI-MCMLXXXVIII
IX-XXI-MCMLXXXVIII
Examples: XXI - IX = XII (21 - 9 = 12) MMX - CM = MCX (2010 - 900 = 1110)
September is the ninth month. 9 is IX. 21 is XXI. It would be written as IX-XXI
September 21, 2013 can be written in Roman numerals as "XXI-IX-MMXIII".
IX-XXI-MCMLXXXVIII
IX-XXI-MCMLXXXVIII
Examples: XXI - IX = XII (21 - 9 = 12) MMX - CM = MCX (2010 - 900 = 1110)
In today's modern notation of Roman numerals: IX-XXI-MCMLXXXII but the ancient Romans probably wrote them out quite differently.
XXI = 21
9 is IX. Roman numerals for 1 - 27: I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, XIX, XX, XXI, XXII, XXIII, XXIV, XXV, XXVI, XXVII
XXI is the same thing as 21.
XXI is the Roman numeral for 21.
Converxencia XXI was created in 2009.
Hespèrion XXI was created in 1974.