A person on #Reddit asked if one person could survive an apocalypse with only the contents of a supermarket for the rest of their lives (ignoring expiry dates) What was the last #FermiApproximation you did ? #mathsky #mathstalk

If you format your LaTex equations using £\text{pounds}£ instead of $\text{dollars}$, then they are 32% more correct in the current exchange market.

I've been watching old episodes of Mr Bean with my daughter. The physical comedy is timeless, but it's really hard to explain the context of what life was like in the 90s.

I am wondering if I have a problem with #oeis searching... It's becoming obsessive #mathsky

oeis.org/A390487 My second sequence just dropped! Numbers k with the property that k is the next number that cannot be expressed as a linear sum of the squares of any of the preceding terms Very happy with that. 1, 2, 6, 7, 11, 15, 21, 25, 61, 106, 142, 155, 515, 551, 36208... #mathsky #oeis

Don't forget to support this great maths book, if you want more fiction adventures that incorporate abstract maths... #MathFi ?

Very happy to share today's episode of #TheMathematiciansPodcast Want to know what is so special about the #HagaSophia, then listen in as we discuss the mathematicians who designed it. Alongside this, a tale of a nearly lost work by #Archimedes www.podbean.com/eas/pb-44w8b... #mathstalk #mathsky

I am absolutely buzzing following the publication of my very first OEIS sequence. oeis.org/A389751 Numbers k such that k^3 can be represented as the sum of k consecutive nonprimes. Eg a(3) = 9^3 = 76+77+78+80+81+82+84+85+86 Only the first 16 numbers found so far, so please come and add more!

I just had a letter box delivered... Which uses up my irony budget for the week.

Just this year's quince harvest.

Talking to my 3-year-old another day: "We played the floor is lava today" (Ooh a teaching moment) "Oh right, and what is lava?" ... "The floor" Well played Lily, you out smarted me.

I had another delightful maths moment with @hopeiona.bsky.social, where we talked at length on the nature of #infinity. If you'd like to listen in then you can find our interview here. From ancient history to ZFCs. www.podbean.com/eas/pb-f4xei-199b19d #TheMathematiciansPodcast #MathsTalk #Mathsky

It turns out it's really hard to draw #Isometric paper by hand. My teacher always told me I wouldn't walk around with a protractor in my pocket, and it turns out she was right. In other news, I might have discovered a new #OEIS Spoiler: 1, 6, 18, 45, 87 #mathsky

I do love it when I am browsing the #OEIS and I find a comment that was within the last few weeks. Oddly titillating to know that someone else passed this way so recently. oeis.org/A011545 #mathsky

It's Out! Episode 6 of #Un-NaturalNumbers the Maths Chat Show. I had such a great time learning all about the number 6 with Sasha, Allison and Tomas. Want to hear about centred hexagons, Ramsey Theory, Triangular Numbers and ice? Watch now! #TalkingMaths #MathsChat #Mathsky youtu.be/Skugo8lB-xA

I try to teach my students to leave their assumptions at the door, which is not going well with our topic of "Proof by Induction" #mathsky #mathsjokes

John Philoponus just dropped, over on #TheMathematiciansPodcast. If you want to discuss infinity, momentum and Christian theology, then tune in to this week's episode. www.podbean.com/ew/pb-p2aea-... #TalkingMaths #Mathshistory #mathsky

I'm not sure how I'm feeling about "Sandals in October" I'm getting cold feet.

I just backed Modultown! A Math-Inspired Children's Book on @kickstarter.com www.kickstarter.com/projects/nat... I had great fun talking to the Authors on a recent episode of #Un-NaturalNumbers, really looking forward to receiving my book. Watch this space for video links. #talkingmaths #mathsky

I just had an absolutely delightful afternoon talking about #infinity with @hopeiona.bsky.social, for a special episode of #TheMathematiciansPodcast. Tune in next Wednesday to hear about the history and the now of infinity. #talkingmaths #mathsky #mathshistory

My wife asked me if these two lines will intersect in 3D space. I said, I'm the maths teacher, so I will ask "-ew" In other news, I'm sleeping on the sofa again. #mathsjokes

Word of the day: Vinculum - The line used in a fraction. Joke of the day: There's a fine line between a numerator and a denominator. #mathsky #mathsjokes

Another lovely night playing "conservation of energy" with my daughter. The box says 8+ but I would easily give it a 10/10. #mathsbuild #classicalmechanics #mathstoys

For any polygon, the maximum number of diagonals that can intersect at a point (that is not the centre) is 7. #mathsart #mathsky Possibly my fact for episode 7 of #Un-NaturalNumbers math.mit.edu/~poonen/pape...

I'm misplacing loads of my model railway - I just can't keep track

In #mathstoday, we started conic sections in FP1 with some model-making!

The people asked for a poem written by #Boethius, so I will provide a poem by Boethius. If you want to hear me read this, then check out this week's #TheMathematiciansPodcast for an episode of philosophy, theology and maths. #TalkingMaths #MathsSky Find it here: www.podbean.com/eas/pb-gwbmn...

Just had a fantastic evening recording episode 6 of #Un-NaturalNumbers, the maths chat show. Really looking forward to it coming out next week Here's a sneaky peak. #mathsky #talkingmaths

Christmas Decs are already in the shops. Anyone want to play a game of "Reverse Mechanical Linkages"? #Mathsky #Mechanics

A contentious opinion: A4 #origami is superior to square form, as you can connect two A4 sheets for a 41% larger di-tonal construction. 1:1 ratios can suck it #mathsky #mathsbuilds

Is everyone ready for #mathober? #mathober2025 I am looking forward to everyones takes, art, musing, jokes, etc. Mathober has no rules - do 1 day or 35-or just follow along. Blog: www.fractalkitty.com/mathober-2025/ Just the prompts: mathober.com #indieweb www.fractalkitty.com/content/imag...

www.desmos.com/calculator/a... Hi @fractalkitty.com, My attempt for day 1 of #mathober with the prompt #link. I was inspired by the loops created by rows of crochet, and tried to render this using a parametric plot. Maybe someone with better crochet skills than me could do a realistic pattern.

Wouldn't it be awful if the first 3 recorded Women in the #HistoryofMaths were lost. At least we get the 4th - Hypatia. SPOILER: her story does not make the patriarchy look any better. Would you like to know why? #mathsky #womeninmaths #themathematicianspodcast www.podbean.com/eas/pb-suv8d...

At some point I need to stop pretending that I am teaching my daughter maths, and just admit that I like #Duplo #mathschat #mathstoys #buildingmaths

I'm not sure anything has emphasised inflation or the cost of living crisis to me more than watching an old episode of #granddesigns from 2009 and seeing their budgets.

So, I'm thinking that Pappus of Alexandria is the first recorded bit of Mansplaining. Here he is trying to tell the lecturer Pandrosion how to do geometry. Sadly this is one of the only references to one of the 4 female Mathematicians before Hypatia. And it leads me to call him Papp-ass #mathsky

How many integers, n, are there, such that n!+1 is a perfect square? Find out on this week's #TheMathematiciansPodcast where we look at Diophantine equations and the man who started them. Could this be the birth of modern algebra? Nearly. #mathstalk #mathsky open.spotify.com/episode/3i3K...

I know I say this a lot, but I was genuinely delighted recording Ptolemy's episode of #TheMaathematiciansPodcast . As it turns out being wrong can sometimes be more helpful than being right, if the goal is to teach people how to think. www.podbean.com/eas/pb-tpxcy... #mathschst #mathsky #podcast

Hey. Guess who very nearly has made it onto the front page of apple podcasts 'Mathematics' list. It's #TheMathematiciansPodcast. Watch out @timharford.ft.com , I only need to get a few million more downloads weekly to steal top billing. Admittedly this "more" is multiplicative not additive.

My mini-bag of skittles had 17 skittles in it with 4 colour options. AM I THE ONLY SANE PERSON LEFT IN THIS WORLD?!?

Just bought a book on optics, for a bit of light reading

Episode 5 of #Un-NaturalNumbers the maths chat show just dropped. In what is arguably our largest number so far: 5. Join me, @hopeiona.bsky.social and Jocelyn to discuss our favourite facts about the number 5. #mathschat #mathsky #msthstalk youtu.be/i-oAWhc5SH0

Was he a Platonic Pythagorean, or a crank? You decide, as we explore Nicomachus in this week's #TheMathematiciansPodcast He's the guy that thought numbers had such well defined personalities, that he wrote a mandetory textbook for the next 1000 years www.podbean.com/eas/pb-w79nx... #mathstalk

I'll be at @tmip.bsky.social later this week, which gave me the perfect excuse to finally soft launch my YouTube channel, where I learn to be a better maths communicator by analysing some of my favourite YouTube creators! youtu.be/1UbjqEWc__0?...

What's this? Oh it's episode 4 of #Un-NaturalNumbers With the magnificent @steckl.es and @paddymaths.bsky.social. Give it a watch if you're in the mood for Klein groups, Harshad numbers and Modulo 4 arithmetic. #mathstalk #mathschat #talkingnumbers youtu.be/RfNBjhHGJ54

ACK! Another #MathArt post! I'm on a roll. Mainly because I'm trying to distract myself from the reality that school is starting up soon for me. Here's my embroidered aperiodic tiling. samjshah.com/2025/08/19/e... Instructions from: www.threadedtheorems.com/aperiodic-ti... #MTBoS

Just finished recording episode 5 of #Un-NaturalNumbers, with the wonderful @hopeiona.bsky.social and Jocelyn D'Arcy. I dare you to calculate n^5 mod 10, for n<10 Go on. A really great set, looking forward to publishing #mathstalk #mathschat

I am very delighted to present my latest interview for #TheMathematiciansPodcast I talk to Dr Daffern about the intersectional history of #maths + #religion www.podbean.com/eas/pb-f9vg6... Bring your skepticism and doubt and be amazed at how the two topics link #mathschat #talkmaths #philosophy

I was playing crazy golf with a bunch of topologists, but they kept arguing over the definition of a hole-in-one.

If I say: Any square (4*4 or 8*8) may be rotated by 90 degrees, if the pieces are fully enclosed in the square. Is it possible to sort all the greens to the left and reds to the right? #playmaths #mathschat #mathsky