The A4 Paper Puzzle

Channel:
United Kingdom Stand-up Maths
Subscribers:
1,300,000
Published on ● Video Link: https://www.youtube.com/watch?v=SOgn6J12NWE


Duration: 8:01
680,596 views
12,640

A puzzle to work out the perimeter of a shape (NO SPOILERS!) complete with an introduction to hash functions.

DO NOT put your answer tot he puzzle in the comments below. If you want to check your answer, repeatedly take the square-root five times and if the first six non-zero digits after the decimal point are 234477 (in numerical order) then you are correct.

Or check your answer using the SHA-256 hash function:
http://hash.online-convert.com/sha256-generator

Watch James on Numberphile talk about √2 and A4:
https://www.youtube.com/watch?v=5sKah3pJnHI

Watch me apologise for making fun of Imperial units:
https://www.youtube.com/watch?v=r7x-RGfd0Yk

MATT PARKER: Stand-up Mathematician
Website: http://standupmaths.com/

Music by Howard Carter
Design by Simon Wright



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Tags:
maths
math
mathematics
comedy
stand-up
A4
root two
root 2
irrational number
puzzle
paper
hash
hash function
computing
bitcoin
challenge