I've learned some roman numbers, can you please check if I got them right?

Question

1-10:
1: I
2: II
3: III
4: IV
5: V
6: VI
7: VII
8: VIII
9: IX
10: X

Answer 1

11-20:
11: XI
12: XII
13: XIII
14: XIV
15: XV
16: XVI
17: XVII
18: XVIII
19: XIX
20: XX

Answer 2

Please check if it is right or wrong :(

Answer 3

I believe you're right.

Answer 4

Thx! Sorry im late