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NEW VIDEO Numberphile: Infinite keys at Hilbert's Hotel If you have infinite keys mixed up in a bucket, and you remove them one by one to hang on the next available room key hook - what is the probability at least one of the rooms gets the correct key? youtube.com/watch?v=uezOrc…

Some perfect mathematical reading for you all this Sunday in the form of the 2nd article in the abstraction series from TRM intern Joe Leach. Learn how graph theory is used to turn complex real-world problems into simple drawings - with simple solutions. tomrocksmaths.com/2025/05/17/abs…

Had an excellent day out at Wembley yesterday to watch the Women’s FA Cup Final. Congratulations to Chelsea for completing an undefeated season in the domestic competitions: 5/5 in the FA Cup; 3/3 in the League Cup and 19/22 in the Super League, giving a 90% win percentage.

You all seemed to enjoy this last time - so what do you think I’m teaching today? This is a 2nd year course University of Oxford.

Such a fun session at St James’ Catholic High School today - thank you to the students for bringing such energy and enthusiasm to the Maths Colloquium. May your future studies always be this enjoyable :)

New staff photo @stedmundhall hanging pride of place in the SCR (Senior Common Room). Can you find me? And yes, this is basically a game of ‘Where’s Wally’ played with Oxford fellows… but why not? It is Friday after all :)

If you enjoyed my video on infinite keys Numberphile be sure to check out the extra footage on Numberphile 2 where I explain how to work out the probability of getting exactly m keys correct. Fair warning, this is not for the faint hearted... youtube.com/watch?v=txoJDJ…

NEW VIDEO: a sneak preview of my upcoming YouTube video where I take a Maths Exam from the year 1866. Yes, you read that correctly - the exam is 150 years old... You're in for a WILD ride - full video premieres Wednesday 28th May at 5pm (GMT+1). youtube.com/shorts/X8seU09…

Perfect reading for your bank holiday Monday - TRM intern Joe Leach continues the 'Abstraction' series with an exploration of the link between vectors and Fourier Series. A great example of the true beauty of mathematics... tomrocksmaths.com/2025/05/26/wha…

The results are in... Congratulations to "29" for an exceedingly narrow victory over "to lick something into shape"! Words aka Susie Dent need your votes in round 2 - coming Thursday. And if you haven't seen it yet, watch the battle from round 1 here: youtube.com/shorts/jxam_ui…

NEW VIDEO: Watch me take a Maths Exam from the year 1866... so only the 159 years old. One of the most ridiculous exams I've done. Join the premiere at 5pm (GMT+1) to see why! youtube.com/watch?v=TlUM-Q…

Such a pleasure to join Andy on Spark Radio to talk all things maths, including some behind-the-scenes info from my recent stint on COUNTDOWN... Recorded during my recent visit to KGV School in Southport. Listen here: open.spotify.com/episode/1neFxs…

Numbers vs. Words Round 2: "Binfluencer" vs. "3435" Susie Dent puts forward an excellent example of a portmanteau, whilst Dr Tom Crawford opts for the only known 'Munchausen number'. Which is your favourite? Cast your vote at the link in the comments. youtube.com/shorts/iTDYm6T…

Tattoo #63 - Soul Badge from Pokémon Generation I. Who do you defeat to win this? And do you remember the Pokémon they have?

The 'Abstraction' series by TRM intern Joe Leach concludes with an introduction to Group Theory as an abstraction of numbers. Learn about binary operations, group axioms, permutations, and prime factorisation - read the full article at the link below. tomrocksmaths.com/2025/06/01/the…

CS50 is back in the United Kingdom! Join us in London on Friday, June 20, 2025, for a @CS50 Hackathon with the Oxford Continuing Education and Meta, with Professor David J. Malan from Harvard University, Professor Daniel Wilson from Oxford, Professor Tom Crawford from Oxford (and Cambridge University and

Great little segway into our recent conversation... pearson.com/en-gb/schools/…

And so it begins... the 2025 TRM Essay Showcase is now open! Over the next 2 months look forward to over 300 essays on a range of mathematical topics, written by students, hobbyists, and professional mathematicians. We start with Group I: entries 1-20. tomrocksmaths.com/2025/06/03/trm…