L.L. Kross - Mind Hurdles: Optical Illusions

Brain Teasers For Everyone

LL Kross

PUBLISHED BY:

Lanie Dills Publishing

Cover Design - Carla Chadwick

http://mindhurdles.com/

All rights reserved: No part of this publication may be replicated, redistributed, or given away in any form without prior written consent of the author/publisher or terms relayed to you herein.

WARNING: Some of the illustrations contained in this book may cause dizziness and disorientation when viewed for extended periods of time. The author nor publisher is not liable for any damage incurred from viewing the contents of this book.

Copyright 2013

Forward
After four decades of teaching mathematics, I realize that I have taught students as young as children in kindergarten and as old as teachers taking graduate classes.

Needless to say, during my long career, Ive also taught every grade level in between. In setting up my classroom regardless of the level I was teaching, there was always a spot for books about brainteasers, problem solving and optical illusions.
Optical illusions have always fascinated me and I learned over the years they also fascinated almost all my students. You can find many optical illusions on line.

What are optical illusions?
If you want a technical brain-based explanation, you can find it in many online resources. But for purposes of this book, lets just keep it simple. When the eyes see something, the brain tries to make sense of it. When the brain cant do that or sees more than one thing, we have an optical illusion.

The optical illusions in this book were put together for your enjoyment, but they were also assimilated to help make your brain stretch and think a little more.

Look at the vertical lines in all three pictures? Are they the same length or is one longer?

If you extend the segment on the right side which segment on the left side will it go through?

What do you see?

Are the horizontal lines parallel?

What animal do you see? Look again.

Look at this picture. If this is a book, is it opening toward you or away from you?

Are these shapes the same size or is one larger than the other?

Look at this shape. Is it circular? Look closely.

Are the inner circles the same size or is one larger than the other?

Whats wrong with these steps?

Do you see the goblet on the left? Do you see the same image on the right?

How many shades of grey do you see? Look again.

Look at this picture. How many boards do you see? Count again.

Look at this picture. Do you see a woman looking to the left? Look again. What else can you see?

Look at this cube. Do you see anything wrong?

How many prongs do you see?

What do you see ?

Stare at the picture above. What happens?

Focus on this picture. What happens?

Look at this picture. What happens?

Stare at this picture. What happens?

Are you at the top looking down or at the bottom looking up?

Look closely at this picture. Do you see movement?

What do you see?

What do you see?