Hidden center: Beneath the center triangle, in the very center, lies the final egg, which forms the base for the others.
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.
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