Illusions

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Selection of the most astonishing Optical Illusions. You will not believe your eyes, even if you understand what you see.

Coin Distances
Coin Distances
after Martin Gardner
Two distances are associated with three coins. Could you find a certain position of the coins so that the distances are equal? Is there any way how the moving coins can distract you from the mission?
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Point the Center
Point the Center
by Peter and Serhiy Grabarchuk
Only one of the nine arrows points exactly into the center of the circle, all of the remaining are only close to it. Can you guess without any additional measures which one is it?
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Find the Center
Find the Center
by Martin Gardner
See how several bows inside a circle make you stuck in the illusion about where the true center of this circle is. Can you get out of it with the help of your eyes only?
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Crazy Lines
Crazy Lines
after Martin Gardner
Sometimes a perspective brought into a picture may bring there a kind of illusion as well. Make sure the picture will not mislead you while finding out the truth.
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Arrows
Arrows
by Serhiy Grabarchuk
A distance when pointed from different directions may looks different. Despite this amusing illusion can you find two exactly identical distances?
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Turning Digits
Turning Digits
by Peter Grabarchuk
Make some simple device be turning and try to guess what image it will produce. It seems your imagination will be required instead of your math skills.
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Elusive Spots
Elusive Spots
Are there really any spots between the squares, and why do they only blink and try to disappear when you want to stare at any of them?
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The Inner Circle
The Inner Circle
Two red circles are surrounded with two different groups of blue ones, and seem to be different too... But maybe it's just an illusion?
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Missing Piece
Missing Piece
after Martin Gardner
Can you find the missing piece of cake? It seems that someone took it...
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Pencil Illusion
Pencil Illusion
by Serhiy Grabarchuk
Slowly scroll the page down and... you may see something unusual.
Play  |  Download  |  Version for Pocket PC
Impossible Object
Impossible Object
by Serhiy Grabarchuk
This object looks to be assembled of three rods and one frame. Do you think you will be successful, if you try to make it?
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Square Waves
Square Waves
by Serhiy Grabarchuk, Jr.
The straight lines on square grids seem to be curved where they are covered with the shaded figures.
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Last Updated: September 21, 2011 top
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