Did you know we also have a MathsJam annual gathering in Oceania? The Oceania MathsJam Gathering (OMG) has shared this video of their 2025 public keynote talk, a fun talk on charts and data visualisation from Dr. Christoph Bartneck of Canterbury University, NZ:

Attendees of this year's Big MathsJam UK Gathering should now have had a post-event email with links to session recordings and some follow-up info. We hope you all had a lovely time, and make sure you're on our mailing list to get the details for 2026! mathsj.am/ukg-mailin...

Arrived at #MathsJam on Friday to find my front door key tangled up in my keyring. Many mathematicians (>10) had a go at untangling it. No go. Stupid o'clock Sunday morning, heading to check out as I had to miss the final day, I pull my keys from my back pocket. All untangled. #MathsJam trolling me.

I wanted to make a poster about this for the new Big #MathsJam feature, but I don't have a printer, so:

Also of potential interest to Big #MathsJam folk & other maths fans: don't forget to submit recent maths stuff ready for December's Carnival of Mathematics: aperiodical.com/carnival-of-...

Big #MathsJam -ers who took the train home today and are also movie fans might have recognised the railway station building from 1987's Superman IV. Various other buildings in CMK were used as locations for bits of Metropolis in the movie. www.bbc.co.uk/news/uk-engl...

Martin Whitworth says passports are size A6.5 #mathsjam

The real winner of my #mathsjam competition is me, who got all these incredible frog pictures!

Fabulous weekend at Big #mathsjam, sorry to have to leave before the end. I love the little bubble of maths joy I get to be part of.

@bigmathsjam.bsky.social is officially over! Many thanks to everyone who organised, contributed to it, maintained the Gather town remote space etc. #mathsjam #remoters 👏👏👏

Lovely weekend at #mathsJam . Thanks to all those who organised and those who gave talks. Hope to see you all next year! Safe journey home everyone.

Another excellent Big #MathsJam. Somehow I'm less tired than usual. Maybe it's the travel that does it‽

Had a lovely weekend at @bigmathsjam.bsky.social getting lots of mathsy inspiration from all the best people, but I'd be lying if I said that I wasn't also glad to be going home to destimulate!! Thanks so much to Colin Katie, Scroggs and everyone else who helped for a brilliant time! #Mathsjam

And we're all done with the MathsJam UK Gathering for 2025! Thanks to everyone who came along and joined us - in-person or online - and who gave talks, volunteered to help or brought along interesting maths to share! Hope to see you all again next time!

To start the final set of talks at #mathsjam, Vanessa Madu sharred her explorations of sequences of consecutive odd semiprimes. You can read her blog post about it here:

And to finish this session, we've announced the winners of the competitions - the bakeoff winners are now listed on the cakes page: mathsjam.com/gatheri...

Starting the penultimate session of #mathsjam 2025, Kristin Ohlmann showed us how the digits of pi and tau can be used to improve visibility of her unicycle. And she's actually brought it with her to MathsJam! Here's her Python code:

Why I'm not at Big Maths Jam in person ❤️

Hamish joins the other Mathscots at @bigmathsjam.bsky.social

To kick off the second Sunday session at #mathsjam, Fredrik Motland Kirkemo shared a cool magic trick from G4G Europe, involving a set of clown cards with each clown wearing different coloured clothes.

Woke up to find the kids squabbling over who gets to watch the @bigmathsjam.bsky.social stream on the Nintendo Switch today #mathsjam

Day 2 of the Annual MathsJam Gathering! #mathsjam

For the first #MathsJam in *ages* I remembered my Mathscot: meet The Rat! I'm not sure what he's clambering on, there.

It's Day Two of #mathsjam! We kicked off the first session of the day with Miles Gould, telling us all about dual numbers en.wikipedia.org/wik... You can find out more about them, and the magic of automatic differentiation, in this blog post by Dan Piponi http://blog.sigfpe.c...

To kick off our final session of the day, Nettie Margolis shared the formula for the derivative of an inverse function, which is impressively neat and tidy! math.libretexts.org/... #mathsjam

In our third session, we started with a talk from John Read aiming to answer the question: Can AI's play the game SET? (Turns out the answer is, yes, but not honestly or accurately). #mathsjam

Hamish enjoying @bigmathsjam.bsky.social with his friends

Jørn Hafver, from Norway's www.jaermuseet.no/vi... Vitenfabrikken science museum, shared a mathematical magic trick adapted from one he saw at G4G Europe: instead of using binary to guess a number, what if it's in base 3, and you use rock, paper, scissors instead? #mathsjam

In the first session of MathsJam 2025, we started with four quick-fire magic tricks in five minutes from Tiago Hirth (you may find some more in his book: mathsj.am/tiago-book). Next, Robin Houston shared some fun shapes (stellations of the rhombic dodecahedron). mathworld.wolfram.co... #mathsjam

Who are my remote #mathsjam pals this year? I'm ensconced snugly in L-P towers and I'll be helping out in the virtual venue all weekend.

Tiago Hirth is still wearing his signature red scarf in his @bigmathsjam.bsky.social talk today 🧣🃏 #mathsjam #bigmathsjam

Today is the start of this year's MathsJam Gathering: ~200 maths fans will come together to share puzzles, tell stories, play games and have fun with maths. The first session of talks starts at 1.30pm, and until then people can enter competitions, play with things and make new friends!

This weekend is Big MathsJam, aka the MathsJam UK Gathering. We'll be posting from here about the interesting maths talks people are sharing, and if you'd like to share anything from the event (with permission of anyone featured!) you can use #mathsjam.

We’re looking forward to seeing everyone at MathsJam Gathering this weekend - follow along here to see what people are sharing, and use #mathsjam to share your favourite moments!

Only a week to go until this year’s MathsJam UK Gathering! Are you booked on? Are you joining us online? We’re looking forward to seeing you there. Bring your favourite puzzles and toys! mathsjam.com/gatheri...

Remote tickets for the MathsJam UK Gathering are available for just £20 - join us online to watch the sessions and join in with Q&A! Details at mathsjam.com/gatheri...

We’ll be singing along to mathematical covers in a wide range of styles at this year’s MathsJam Jam - everything from Kenny Rogers to Blur! There’s a playlist of the songs we’re covering here, and lyrics/chord sheets coming soon.

Not sure what to expect from the MathsJam UK Gathering? We made this video with some past participants sharing why they love it:

Want to help out with this year’s MathsJam UK Gathering? We need volunteers to help with running the event, organising lifts for attendees, and many other things! Email [email protected] if you can help.

In-person tickets are selling fast for the MathsJam UK Gathering - join us (in-person or remotely!) for a weekend of recreational maths in a conference centre and meet others who also love maths! Details at www.mathsjam.com/gat...

Last year’s talk topics included cutting things into ninths, backwards prime numbers, and a symmetry-based dance routine. See the full list of previous talks in our archive: www.mathsjam.com/gat...

On the Saturday evening at MathsJam, we gather around the metaphorical campfire with instruments and voices to sing songs that have been reimagined with mathematical lyrics. Find out more, and how to submit lyrics, at mathsjam.com/gatheri...

Only 5 days until early-bird tickets for the 2025 MathsJam UK Gathering end - get in quick before the prices go up! Join us in Kents Hill on 22-23 November for a weekend of recreational maths, meeting cool people and sharing interesting things! Details at mathsjam.com/gatheri...

Don't forget we have a shop selling Big MathsJam merch - from t-shirts to tea-towels, buy something with MathsJam on it to show your appreciation for recreational maths.

What can you expect if you attend the MathsJam UK Gathering? Interesting maths talks, puzzles, competitions, toys, games and art, as well as cool people, great conversations and serendipitous occurrences! Book now at mathsjam.com/gatheri...

If you’re already booked for the Gathering, you should have had an email including a link to submit your talk - the deadline is 20th October. More info on talks at mathsjam.com/gatheri...

Want to know what the MathsJam Gathering is like? This video has past attendees sharing their favourite bits! Book now at mathsjam.com/gatheri... youtube.com/watch?v=...

Want to join the MathsJam UK Gathering remotely? That’s also an option, with tickets only £20. Book now by visiting mathsjam.com/gatheri...

Tickets for the MathsJam UK Gathering cost just £190 for a full weekend, including all sessions and food (or £310 for two sharing), with further discounts for unwaged, and for early bird which closes 30th Sept. Book now by visiting mathsjam.com/gatheri...