The Roman numeral I represents the number 1...
1 = I
2 = II
3 = III
4 = IV (or IIII)
5 = V
6 = VI
7 = VII
8 = VIII
9 = IX
10=X
11=XI
12=XII
13=XIII
14=XIV
15=XV
16=XVI
17=XVII
18=XVIII
19=XIX
20=XX
21=XXI
22=XXII
23=XXIII
24=XXIV
25=XXV
26=XXVI
27=XXVII
28=XXVIII
29=XXIX
30=XXX
31=XXXI
32=XXXII
33=XXXIII
34=XXXIV
35=XXXV
36=XXXVI
37=XXXVII
38=XXXVIII
39=XXXIX
40=XL
41=XLI
42=XLII
43=XLIII
44=XLIV
45=XLV
46=XLVI
47=XLVII
48=XLVIII
49=XLIX
50=L
50
C represents 100 (a Century is 100 years). The L represents 50. The fact that the I (one) comes before the V (5) means you subtract it. So it represents 154.
538
XII
CXXVI
in roman X
L
roman numarals are v,i ,x,c and some other stuff with represent numbers
C represents 100 (a Century is 100 years). The L represents 50. The fact that the I (one) comes before the V (5) means you subtract it. So it represents 154.
Your answer is XXI
XII
CCCLXII
DCC
1 = I
XXXIX
538
XII
CXXVI