Matt Parker on Twitter: "Today is the 21st day of the 21st year of the 21st century! To celebrate here is a 21 by 21 magic square which has a magic total
![Matt Parker on Twitter: "Also a 4×4 "diabolical" magic square [ http://t.co/kYA0ABW0My ] rendered as a torus made of the same origami cubes. http://t.co/nfKVKQ0tcH" / Twitter Matt Parker on Twitter: "Also a 4×4 "diabolical" magic square [ http://t.co/kYA0ABW0My ] rendered as a torus made of the same origami cubes. http://t.co/nfKVKQ0tcH" / Twitter](https://pbs.twimg.com/media/COjix6EWIAEx4Po.jpg:large)
Matt Parker on Twitter: "Also a 4×4 "diabolical" magic square [ http://t.co/kYA0ABW0My ] rendered as a torus made of the same origami cubes. http://t.co/nfKVKQ0tcH" / Twitter
![Matt Parker - A Funny Thing Happened on the Way to the Formula - National Museum of MathematicsNational Museum of Mathematics Matt Parker - A Funny Thing Happened on the Way to the Formula - National Museum of MathematicsNational Museum of Mathematics](https://in.momath.org/sites/default/files/civicrm/persist/contribute/images/matt_park_face.jpg)
Matt Parker - A Funny Thing Happened on the Way to the Formula - National Museum of MathematicsNational Museum of Mathematics
![It's me, Matt Parker, maths author, youtuber and creator of semi-adequate magic squares. A+M+A : r/IAmA It's me, Matt Parker, maths author, youtuber and creator of semi-adequate magic squares. A+M+A : r/IAmA](https://external-preview.redd.it/qCVO_XMuQriYV57TCphchLkiHQGde2nqhwrvsozaYUQ.jpg?auto=webp&s=3a63a1f1473153ec755fd41b5e1e6f2148dab57e)
It's me, Matt Parker, maths author, youtuber and creator of semi-adequate magic squares. A+M+A : r/IAmA
![Matt Parker on Twitter: "Fantastic @numberphile video about Square Squares by @jamesgrime. https://t.co/qRZntlpPRR And don't think this went unnoticed! https://t.co/3LT800m5MF" / Twitter Matt Parker on Twitter: "Fantastic @numberphile video about Square Squares by @jamesgrime. https://t.co/qRZntlpPRR And don't think this went unnoticed! https://t.co/3LT800m5MF" / Twitter](https://pbs.twimg.com/media/DBy1TSlXcAAKMDo.jpg)