A square number is the product of two identical factors.
When a number is multiplied by itself, the result is a square number.
I multiply 3 by itself: 3 × 3 = 9.
So, 9 is a square number.
The word square is used because the visual representation of the multiplication looks like a square.
The number of square units inside the visual representation equals the product of the multiplication. A square number can be determined by counting the square units inside the square.
To check if a number is square, see if it is the product of two identical factors.
The number 49 is a square number since 7 × 7 = 49.
Check if the number forms a square when it is represented visually.
The number 49 is a square number since it’s possible to form a square with 49 square units that is 7 units long by 7 units wide.
