The grid has a total of nine intersections, corresponding to the number displayed.
Model 2: 2×2 grid with intersecting lines
There is only one central intersection here, which gives a value of 1.
Model 3: 3×3 grid with horizontal and vertical lines
This time, there are no diagonal lines. If you look closely, you will notice four distinct points of intersection between the horizontal and vertical lines.
The final solution

For the last grid, the number you are looking for is 4. Each intersection counts, and by adding them together, we get this result.
Why do these puzzles stimulate thinking?

Visual puzzles go beyond mere entertainment: they sharpen attention, strengthen logic, and develop thinking skills. By tackling these challenges, you train your mind to find solutions where others see only obstacles.
The next time you come across
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