A good visual explanation of the missing square puzzle that shows how this interesting math problem creates an optical illusion. The puzzle is not easy to understand until you see the math explanation. If you want to see another example of this watch Optical Illusion With Tiles.
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Photo Of The Day
The Photo of the Day features beautiful and interesting photos from around the world.
Landscapes, Sunsets, Sunrises, Wildlife, and more photos for you to enjoy.