Find the Number Represented by Three Squares: Visual Math Riddle

Let's analyze the problem to determine which number is represented graphically:

• Examine the graphical representation, which shows three separate rectangular sections with no internal details filled in.
• Given the specifications of interaction with natural numbers, the total filled sections likely imply how many units or items are present.
• By aligning the steps, each complete section or any marker is counted equivalent to one unit or '1'.
• As there are a total of three solid interacting placements, these each denote one unit.

Summing up this logical deconstruction, we observe that there are 3 visible markers (or shaded parts) represented in the graphic depiction.

Thus, the number represented is $\boxed{3}$.