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MathsJam

@mathsjam.bsky.social

Maths Jam is an opportunity for self-confessed maths enthusiasts to meet in a pub & share puzzles, games, and other cool maths stuff. Find your local at mathsjam.com

Posts Replies Media

MathsJam @mathsjam.bsky.social · 20/07/2026

For tomorrow's MathsJam, we've put together a pair of origami footballs printed with the design of this year's World Cup Ball (the Trionda) which you can print and fold! Thanks to Ottawa MathJam for the idea, and to Alice Zhang for putting the design together: mathsjam.com/assets/...

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MathsJam @mathsjam.bsky.social · 23/06/2026

Exeter has not only summoned Maxwell's demon but also a Markov chain demon from the football puzzle from Jane Street

Markov chain puzzle from Jane Street describing average number of moves to return to the start on a random walk on a football

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MathsJam @mathsjam.bsky.social · 23/06/2026

Manchester have found a terrifying knife/compass and it's being put to good use making an Apollonian gasket

photo of a cutting mat (on a table in a pub) on which a paper circle has two large circles cut out of it, then two of the next largest circles that will fit cut out, and a next set is in progress using a pair of plastic compasses on which the pencil is replaced with a tiny blade

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MathsJam @mathsjam.bsky.social · 19/05/2026

Manchester: oops

Photograph of a bar chart drawn on a piece of paper. There is a single bar labeled "Time we spent remembering to do stuff on the Shout". The axes are modified so that the top of the bar is level with zero. The bar has an arrow pointing to it which says "Can't win here!"

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MathsJam @mathsjam.bsky.social · 21/04/2026

Manchester have been having fun with the Take Sides game from the Shout (and we're considering rule variants, like different sizes of dice, or whoever's solution is voted nicest gets to pick a restriction for the next round, like "no addition")

photo of some paper on a table, where a game using the numbers 6,6,1,1,1 has been won by the solution "6^1^1^1 = 6"

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MathsJam @mathsjam.bsky.social · 21/04/2026

photo of a tiny printer on a table in a pub surrounded by MathsJam paraphernalia and drinks; the printer has printed a tiny receipt which says "Manchester: we also have a tiny printer"

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MathsJam @mathsjam.bsky.social · 24/03/2026

Manchester have been playing with multilink cubes, and have had a go at the puzzles on the Shout.

photo of a little guy made out of multilink cubes sat in a table in a pub surrounded by MathsJam detritus

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MathsJam @mathsjam.bsky.social · 24/03/2026

Nottingham having fun with Double Negative both working out possible solutions by hand and by spreadsheet to see the pattern.

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MathsJam @mathsjam.bsky.social · 16/12/2025

Manchester: Two attempts at the capital (and lower-case, assuming normal numbers are in caps) digits.

Photo of some pieces of paper on the table in the pub on which people have written the digits 0 to 9 and, above and below them, modified versions of each

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MathsJam @mathsjam.bsky.social · 16/12/2025

The three faces of this larger hexaflakesagon (we have a theory that two of them are the same because there's a reflection symmetry in the design; if the design has too much symmetry they would all look the same)

Photo of a larger hexagonal paper snowflake on the table in a pub

Photo of a slightly different larger hexagonal paper snowflake on the table in a pub

Photo of a larger hexagonal paper snowflake on the table in a pub; this one looks the same as the second one but rotated around slightly

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MathsJam @mathsjam.bsky.social · 16/12/2025

Manchester: we've been making paper decorations, including this hexaflakesagon

Photo of a paper shape on the table - it's a hexagonal snowflake cut from multiple thicknesses of paper. Nearby there's a pint glass and a paper chain made from Mobius bands

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MathsJam @mathsjam.bsky.social · 16/12/2025

Cheltenham have 4 people. We’re on table 41.

Copies of Mathsjam Shout, a copy of Chalkdust magazine and a puzzle on a pub table.

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MathsJam @mathsjam.bsky.social · 16/12/2025

King's Lynn Maths Jam is kicking off at table 74 #GlobeHotel #KingsLynn #Maaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaths

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MathsJam @mathsjam.bsky.social · 21/10/2025

Guildford MathsJam: we’re not usually this messy…

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MathsJam @mathsjam.bsky.social · 21/10/2025

#nottingham Jam have written a spreadsheet to solve the first two Code Wheel puzzles in the shout making both a Caesar and Enigma wheel spreadsheet style. Now onto the third code.

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MathsJam @mathsjam.bsky.social · 24/09/2025

After a bit of a break, Tacoma MathsJam is back in force. Had a great time, looking at dominoes, and asking similar questions about rectangular triominoes. In honor of the Shouts authors, someone brought a book they had been gifted but not yet explored.

This months activities from the Shout and a book of puzzles, riddles and enigmas.

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MathsJam @mathsjam.bsky.social · 23/09/2025

Manchester: we have also built a set of Soma cube pieces out of train tickets and covered them in different colours of card, because why not

Photo of some paper cubes joined into three- and four-cube blocks, on a table, being arranged into a big cube. There is also a pint glass and a teapot

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