Yes.
Yes. The square root of 81 is 9, which is a rational number.
81 is a composite number and it is also a square number
3 x 3 x 3 x 3 x a = 81a
No.
200 is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer.
No, 325 is not a perfect square however 324 is a perfect square.
A perfect square is a square of an integer (a whole number).
81 is a Composite Number
154 is a not perfect square.
30 is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer.
500 is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer.
38 is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer.