How many faces do you see?

1... 2... or 3?

What do you see?

 

An Eskimo or an Native American?

What do you see?

 

A face or the word "liar"?

Look carefully at the two pink diagonal lines. Are they the same shade of pink
or are they different shades?

 

Look carefully, they are the same. Don't let your eyes deceive you!

How many full cubes can you count in this pattern?

 

Six or seven?

What do you see?
Which way are the stairs headed? Up or down?