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Tell them to think of a number between 1-9.

Tell them to double it

Tell them to add, let's say, 4

Tell them to half it

Tell them to tell them their answer

and their answers would be 2.

How? Easy.

Half of the number you tell them to add after they double their, is the number they started with.

In this case, 2 would be their starting answer because half of 4 is 2

It also works with odd numbers, if you're good at calculating decimals

So remember.

Think of a number.

Double it

Add a number of your choice

Half it

Ask for their answer.

Half the number you told them to add

Tell them

And there you go, they'll think you're a mind-reader

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12y ago

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