The side of a square is 4 cm. It is cut into 4 equal squares. What is the area of each small square ?

The correct option is 4 cm².

Step 1: Find the area of the original square.
The side of the original square is given as 4 cm.
The formula for the area of a square is:

$\text{Area}={\text{side}}^2$

Substituting the given side length into the formula:

$\text{Area of original square}=4\times 4=16{\text{cm}}^2$

Step 2: Find the area of each small square.
The original square is cut into 4 equal small squares. Therefore, the area of each small square is equal to the total area divided by 4:

$\text{Area of each small square}=\frac{16{\text{cm}}^2}{4}=4{\text{cm}}^2$

Thus, the area of each small square is 4 cm².