## Square numbers

A **square number** is a number multiplied by itself. The symbol is ^{2} (we call it **exponent**). The number squared is called the **base**:

$$2^2= 2 × 2 = 4$$

$$3^2 = 3 × 3 = 9$$

$$4^2 = 4 × 4 = 16$$

We can read this as two/three/four to the second power.

A **cube number** is a number multiplied by itself 3 times:

$$2^3 = 2 × 2 × 2 = 8$$

$$3^3 = 3 × 3 × 3 = 27$$