1. List of first 12 perfect squares:

I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
X.
XI.
XII.

1. 1

2. 4
3. 9
4. 16
5. 25
6. 36
7. 49
8. 64
9. 81
10. 100
11. 121
12. 144