Turning Digits

 

by Peter Grabarchuk

Home
Home / Puzzle Playground / Illusions /

To demonstrate this illusion make a simple device. Its two sides are shown in Figure 1. 

Figure 2 will help you to draw the exact patterns on the both sides, or you may use our
Print 'n' Play PDF Version for this. 

Take the device in such a way that to hold the pieces of string between your fingers as shown in Figure 4. Now turn the pieces of string very quickly to make the rectangle turning (place the cursor over the figure 4 to see this motion). 

How do you think, what image will you see instead of the question mark?

Last Updated: August 8, 2007  |  Posted: April 18, 2001
Illusion
Explanation
Download
PDF Version (302 KB)

More From the Author
Discover more from Peter Grabarchuk in the Modern Classic Puzzles book
Discover more from Peter Grabarchuk in the Modern Classic Puzzles book.

Step Through:

Arrows   Elusive Spots
< Previous Next >
Discover More

 
< Home   |   Our Privacy Policy   |   About Puzzles.COM   |   Link to Us   |   Contact Us
Concept: Copyright 2001-2007 Peter Grabarchuk.
Web page: Copyright 2001-2007 ThinkFun Inc. All Rights Reserved.
ThinkFun - Everybody plays.