What is the truth behind those "human calculators"?

>>8799439
I think it's like the guys who memorize 50000 digits of pi, clever techniques.

For most of history it has been tricks but occationally you get people who have a very clear "gift" which today we can find through brain scans to be a unification of brain activity or a form of synesthesia, both being automatic processing.

-Sorry for the run-on grammar is one of my weaknesses.

>>8799439
Ever wonder why people spend their entire lives trying to run the fastest when we have bicycles? Probably just want to make a living for themselves.

File: Super+retard+_a78097_15468.jpg (26KB, 499x376px) Image search: [Google]

26KB, 499x376px

>>8799439
>watching world's most famous human calculator give a talk
>he says he discovered that if a number is divisible by 9, the sum of all its numbers will also be divisible by 9
>says he traveled the world over and no one could tell him why
>mfw

it is a feat of short term memory

>>8799474
[math] n \in \mathbb{N} \text{and} \ 0\leq a_0,a_1,a_2,a_3,\cdots < 10 [/math]
[eqn] n = a_0 +a_1 10 + a_2 10^2 +\cdots [/eqn]
[eqn] \implies n \equiv a_0 + a_1 + a_2 + a_3 + \cdots \ \ \text{mod} \ 9 [/eqn]

Moral of the story, you can be a human calculator and still not know elementary modular arithmetic.

>>8799482
Know\=\Understand

>>8799453
Your grammar was actually a lot better than I normally see on this site honestly. Do you have any articles about brain unification or synesthesia improving functions?

>>8799439
You can be a human calculator really easily by visualizing a slide rule or abacus in your mind. It's not magic.

>>8799439
"Its probably sexual"