Squares.
I'm serious. Not everything in math has a fancy name.
* * * * *
Except that in this case there is: they are called perfect squares.
a perfect square
Such a number is called a "perfect square".
Such a number is called a "perfect square".
Such a number is called a "perfect square".
perfect squares
Square numbers * * * * * Although "perfect square numbers" is more descriptive.
They are called irrational numbers; numbers that can be expressed as a ratio of integers are called rational numbers. Some common irrational numbers are pi (3.14159...) and the square root of two.
What are the integers between 0 and 100 whose positive square roots are integers?
The square root of 31 is an irrational number and so there are no integers for it.
The integers are 7, 8 and 9.
All of the integers between 20 and 30 are square roots.
It is a perfect square.