Numbers that are the square of a whole number. For example, 4, 9, 16, and 25 are all square numbers, since they are the squares of 2, 3, 4, and 5, respectively.
Numbers that are the square of a whole number. For example, 4, 9, 16, and 25 are all square numbers, since they are the squares of 2, 3, 4, and 5, respectively.