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Hint: Try to think visually. What happens when we shift these squares?

We can make it a square with each side having 5-unit squares. So, the perimeter would remain at 20. Hence, we can include 16 more small squares.

Note: The kind of problems belongs to logical reasoning with small knowledge of perimeter. Even if we don’t know these then brainstorming will give the answer.

We can make it a square with each side having 5-unit squares. So, the perimeter would remain at 20. Hence, we can include 16 more small squares.

Note: The kind of problems belongs to logical reasoning with small knowledge of perimeter. Even if we don’t know these then brainstorming will give the answer.