Optical illusions and teasers

This page contains a number of optical illusions to tease your mind.
This math puzzle, obtained from http://www.briandela.com/files/picture.gif, is very interesting. Note that this works even if you print this, cut out the pieces, and do it on your desk. Or even if you make your own pieces with the appropriate dimensions.



Count the black dots in the above image. This came from http://www.bigjuju.com/jokes/blackdots.htm



This came from http://www.bigjuju.com/jokes/focusonthedot.htm



This came from http://www.bigjuju.com/jokes/lines.htm



This came from http://www.bigjuju.com/jokes/eyeonthedot.htm



This came from http://www.bigjuju.com/jokes/colourconflict.htm



This came from http://www.bigjuju.com/jokes/elephantlegs.htm



Written by: Dave Regan
Home page: http://www.ao.com/~regan/