The square root of 16 is rational. The answer would be 4, so, yes; they can be rational.
No. Lots of square roots are not rational. Only the square roots of perfect square numbers are rational. So for example, the square root of 2 is not rational and the square root of 4 is rational.
No. The square roots of 2, 3 and 5, for a start, are not rational.
The square roots are rational.
The square roots are irrational.
Some square roots are rational but the majority are not.
No. The square roots of perfect squares are rational.
No, they are not.
No. The square roots 8 are irrational, as are the square roots of most even numbers.
No. Relatively few square roots are.
The square roots are irrational.
The square roots are irrational.
Yes. Both square roots of 36 are rational.