1 = i 11 = xi
2 = ii 12 = xii
3 = iii 13 = xiii
4 = iv 14 = xiv
5 = v 15 = xv
6 = vi 16 = xvi
7 = vii 17 = xvii
8 = viii 18 = xviii
9 = ix 19 = xix
10 = x 20 = xx
538
XII
CXXVI
in roman X
XXIV
roman numarals are v,i ,x,c and some other stuff with represent numbers
Your answer is XXI
XII
L
CCCLXII
DCC
1 = I
XXXIX
538
XII
CXXVI
in roman X