List of first 12 perfect squares:

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

I. 1

II. 4
III. 9
IV. 16
V. 25
VI. 36
VII. 49
VIII. 64
IX. 81
X. 100
XI. 121
XII. 144