Brain Riddles
See if you can figure out what each of the images are below.

                                                
 

Spitzer,p.127

answers:  on the left is 2 inter-locking trainangles  

the middle 2 images are "the cat" & "spot"

the image on the right has two possiblities, however only one can be seen at a time- a vase or 2 faces