Shortcuts
 
Sitemap Sitemap
Comment Contact
Newsletter Newsletter
Store Store
Books
Syndication Features
Gallery Gallery
E-cards
E-cards
Games Games

eureka!!!
corner

Related links

Puzzles workshops and optical illusion exhibitions for schools & museums.

Optical illusions for the media, editors & publishers.

Optical illusions, just optical illusions...



corner top left

Previous optical Illusion of the Month (April - May 2008)

 
by Gianni A. Sarcone and Marie-Jo Waeber
 

 

arrow back Back to Monthly Optical Illusion | Home arrow home

'What's wrong with this picture' challenge

Two-color balls
Guess how many yellow-AND-blue balls
are in the picture below. Time allowed 10 seconds!

find the yellow and blue ball
[Enlarge]

 

 

Solution

There are 3 yellow-blue balls located in C2, H3, and E6 (<- highlight with the mouse).
In visual perception, search is very difficult when you have to find an object with a combination of two SAME attributes (colors), than with more complex attributes (color + form).

Lisa Chavis answered:
NONE!

Anton Sparks answered:
0? - On further reflection - at least 3?

Sherri Sells answered:
There are no yellow and blue balls, only red and yellow and red and blue balls.

Irene Hoogmoed answered:
0!

Cynthia Henderson answered:
Zero yellow and blue balls.

You're encouraged to expand and/or improve this article. Send your comments, feedback or suggestions to Gianni A. Sarcone. Thanks!

arrow back Back to Monthly Optical Illusion | Home arrow home
giflet Recommend this page 

 

 
transparent gif
recommend Suggest this page to a friend | facebook Follow us on Facebook | comment Report any error, misspelling or dead link
Archimedes' Lab | How to contact us | italian flag Come contattarci | francais flag Comment nous contacter
line
About Us | Sponsorship | Press-clippings | Cont@ct | ©opyrights | Tell-a-friend | Link2us | Sitemap
© Archimedes' Lab | Privacy & Terms | The web's best resource for puzzling and mental activities
spacer spacer corner right bottom