What was the number trick the kid did at the table again? I wanted to do it but forgot

The Tall Man (2012)
## Number trick

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4

What was the number trick the kid did at the table again? I wanted to do it but forgot

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I almost freaked when I first did this with the movie because the # I thought of actually was 3 , so at first I thought it was like a psychological 'most people pick 3' thing, but then rewatched it and did it with different numbers.

You can think it mathematically as well. X is the number we are looking for.

(2x + 6):2 - x = 3 =>

(2x + 6):2 - x - 3 = 0 =>

x + 3 - x - 3 = 0

That should work in every number. It was put a bit difficult way in the movie though. When you see it mathematically you will see that there are only two pairs of terms. One pair x and -x and the other pair is 3 and -3. Those pairs neutralize each other.

it works! math is so weird!!!!! im amazeed