I think the answer to this poorly phrased question is "a perfect square".
Try taking the square root. If you get a whole number, then it is.
Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".
A perfect square.
its called a "perfect square"
A perfect square.
A perfect square is a rational number equal to the square of a whole number.
perfect squares
A whole number that can be made by multiplying an integer by itself is a perfect square, or square number. An example is 81, which is a perfect square made by 9 x 9.
The square root of 16 is 4 which is a whole number.
When the whole number is a perfect square, ie it is a whole number squared.
Yes, the whole idea of taking the "square root" of a number is, for example for the square root of 2, to find the number that, when squared, gives you 2. if you try to do both, they cancel each other out.
Try taking the square root. The square root of a positive integer can only be: * A whole number, in which case it is of course rational, or * Irrational.