How To Calculate Square Roots - Numerals That Changed Math Forever

There's an incredible method to extract the square root of a perfect square in your head.

MIT Entrace Exam Arithmetic 1876 WayBackMachine:
https://web.archive.org/web/201904040...
Square root method Burning Math
http://burningmath.blogspot.com/2013/...
Square root method proof Math StackExchange
https://math.stackexchange.com/questi...
Square root method Grey Matters
http://gmmentalgym.blogspot.com/2010/...
Hindu-Arabic numeral system
https://en.wikipedia.org/wiki/Hindu%E...
Laplace quote
https://en.wikipedia.org/wiki/History...
Laplace picture
https://en.wikipedia.org/wiki/File:La...
Abacus picture
https://en.wikipedia.org/wiki/Abacus#...
A similar method to extract the cube root of number in your head explained in this video:
   • How to calculate cube roots in your head  

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