Which number belongs to all the geometrical figures?

To determine which number belongs to all the geometrical figures, we must analyze the Venn diagram provided in the image. The figures consist of a rectangle, a triangle, and a circle.

Step-by-Step Analysis
Identify the Figures: The diagram contains three overlapping shapes:

A rectangle

A triangle

A circle

Evaluate the Numbers based on the Overlap:

We need a number that is located within the boundaries of all three shapes simultaneously (the region where the rectangle, the triangle, and the circle all intersect).

Inspect the Regions:

Looking at the center of the diagram, the number 4 is positioned in the central area where the rectangle, the triangle, and the circle overlap.

Other numbers like 5, 6, and 3 are only within two of the three figures, and 1, 2, 7, 8, 9, 10 are outside the full intersection.