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October 2022

## That Orange Circle

The two orange circles are exactly the same, even though the one of the left appears smaller!

Explanation:

This is called the Ebbinghause effect – it’s an optical illusion.

The size distortion is cause by the size of the surrounding circles and the distance from the centre.

## The Riddles.

What word is pronounced the same if you take away four of its five letters?

How much dirt is in a hole that’s two feet by three feet?

Sara has four daughters, and each of her daughters has a brother. How many children does Sara have?
Answer: Five—each daughter has the same brother.

Spelled forwards I’m what you do every day, spelled backward I’m something you hate. What am I?

How far can you walk into the woods?
Answer: Halfway — after that, you’re walking out.

## Inverted faces

Did you notice the quite distinct differences? For most people, the orientation of the face (that is, right-way-up) is particularly important for recognition.

Scientists believe that looking at faces upside down interferes with our ability to detect very subtle differences in the relationship between facial features.

So if your eyes tricked you in these images, you are not alone!

(What you think you are seeing (L) and When seen right way up. (R))