Uploaded June 2026 | Updated September 2026, 2 weeks ago

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Oxbridge Mathematician Dr Tom Crawford runs the Brighton Half Marathon whilst attempting to solve Countdown Number Puzzles - how far will he get before he can no longer do maths?

Sign-up to join Tom and run the 2027 Brighton Half Marathon here: brighton-half.eventize.co.uk/e/altra-brighton-half-marathon-2027-14352

Directed by James Bloomfield for In Bloom Video.

Produced by Dr Tom Crawford at the University of Oxford. Tom is Public Engagement Lead at the Oxford University Department of Continuing Education: conted.ox.ac.uk/profiles/tom-crawford

For more maths content check out Tom's website tomrocksmaths.com

You can also follow Tom on Facebook, Twitter and Instagram @tomrocksmaths.

facebook.com/tomrocksmaths
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Support Tom's work via Patreon here: patreon.com/tomrocksmaths

Pre-order Tom's new book and receive a signed Pokémon card: https://backstory.london/products/pre-order-how-many-pikachus-would-it-take-to-power-a-lightbulb-by-tom-crawford-signed-personalised-with-pi-keyring-and-pokemon-trading-card-card-pi-keyring-with