This image is a classic visual puzzle designed to trick your brain by arranging the eggs to achieve the desired effect.

Why is this a “test”?

The question “12 or 13?” is a psychological trick. Most people count the 12 eggs that are clearly visible on the surface. Because all the eggs are the same color and similar shades, the eye often misses the egg at the bottom of the stack. Dairy products and eggs

9 (outer) + 3 (middle) + 1 (middle) = 13 eggs.