# Is 30 a 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.

### How do you check if a number is a perfect square?

For a number to be a perfect square, the number's square root has to be a whole number. 9 is a perfect square because its square root is a whole number, 3. If the square root of the number is a decimal, then it is not a perfect square. For example, 13 does not divide evenly so it not a perfect square.