AHGD / BCFE
AHBG / DECF

The "Stack Folding Challenge" is to fold the two lay-outs I show in the video. But the MPMP meta-puzzle is to work out how many different Stack Folding Challenges are possible. That is to say: how many ways can you fold such a piece of paper so that the top-left rectangle is on the top, facing out.

All details about Matt Parker's Maths Puzzles are on the Think Maths website:
https://www.think-maths.co.uk/maths-p...
https://www.think-maths.co.uk/folding...

If you are already subscribed to the main channel, then, fine, here is my second channel.
   / mattparker2  

You can buy the pieces of paper I was using in the video, signed by me.
https://www.ebay.co.uk/usr/standupmaths

All the money from the sale of Stand-up Maths memorabilia goes to charity. WaterAid is working hard to provide sanitation and hand-washing facilities in places which desperately need them, so either bid on the auctions or donate to them directly. https://www.wateraid.org/uk/donate/co...

CORRECTIONS
- Nothing yet. Let me know if you spot anything!

Thanks to Jane Street who are the principal sponsor of my channel. They're amazing.
https://www.janestreet.com/

Thanks to my Patreon supports who do support these videos and make them possible. Here is a random subset:

Jordan Scales
Ben White
Bob Folk
Claire Greenhalgh
Neil McGovern
Ron Hochsprung
Morgan Butt
James Hall
Nicholas Koceja
Alex Hackman

Support my channel and I can make more videos:
  / standupmaths  

Filming and editing by Matt Parker
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician
Website: http://standupmaths.com/
US book: https://www.penguinrandomhouse.com/bo...
UK book: https://mathsgear.co.uk/products/5b9f...
Nerdy maths toys: http://mathsgear.co.uk/