4, 9, and 25,
Laughed at 8,
They felt real wise,
Square numbers rule,
Was their rant,
We graph as squares,
And you can’t!
You think you’re cool, 8 laughed out loud,
My factors rock,
They do me proud, 8 x 1,
4 x 2,
Not boring squares,
Like all of you!

Square numbers are the product of a number multiplied by itself.
An exponent (the small number after the base number) shows how many times to multiply a number by itself:
5^{2} means multiply 5 x 5
5^{3} means multiply 5 x 5 x 5
Square numbers can be graphed as a rectangular array with equal sides, or in other words, a square.
For example,

2 x 2 = 4

3 x 3 = 9

5 x 5 = 25

Math Challenges

What is 7^{2} equal to?

What number do you need to multiply by itself to get 139?

How many rectangular arrays can you find that graph to the number 36?