Calculator Unboxing #2 (Casio fx)

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

We unbox the Casio fx-85GT in black, pink and blue.

Calculator Watch unboxing at: http://youtu.be/wyl-V0mrEio

And more unboxings at: http://youtu.be/eaJtjJNrWf0

Featuring Matt Parker: http://www.standupmaths.com