Is this a man playing a sax or is it a woman's face?
Are the 2 horizontal lines the same length?
Yes, they are equal.
What does this say?-
Are you sure?
Are the diagonal lines parallel to each other? Yes, they are parallel.
How many legs does this elephant have?
Are the stairs rightside up or upside down?
Stare at the small yin-yang. Is it on the back wall of right-side-up stairs, or on the front wall of upside down stairs?
Are the lines between the arrowheads equal in length?
Yes, the two lines are absolutely equal.
Do you see two triangles?
There are no triangles, just the illusion formed by the shapes.
Impossible Triangle
Could anyone build this triangle out of real material?
Queen Elizabeth?
Stare at the image on the left for 30 seconds, then quickly move your gaze to the white box. What do you see?
Where Did the Dots Go?
Stare at the + in the middle and you'll see a green dot orbiting, even though there is no dot there. Stare longer and all the pink dots will seem to vanish.