Answer:
[tex]6^2[/tex]
Step-by-step explanation:
The square root of a perfect square is a rational number.
So let us take the square root of each number to see which is a rational number.
[tex]\sqrt{6^1}=\sqrt{6}[/tex]......irrational
[tex]\sqrt{6^2}=6[/tex]......rational
[tex]\sqrt{6^3}=6\sqrt{6}[/tex].........irrational
[tex]\sqrt{6^5}=36 \sqrt{6}[/tex]irrational.
Therefore [tex]6^2[/tex] is a perfect square
