Math Problem

Animal Illusion Pics
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Color Difference

Which color is the darkest : A or B ?

Count the Faces

How many human faces do you see in this picture ?

More Count the Faces

Skulls

Cover from the Def Lepard album 'RetroActive' (photographer : Nels Isralson)



Two prints by William Gillbert.



Unknown Author

Picture by Dali



Impossible picture of an arch.