Ever wondered what the biggest recognised number in mathematics is? In this episode, Theo explores the mind-bending concept of Rayo’s number, one of the largest numbers ever described.

Together with his curious mum, he breaks down this abstract maths idea in a fun, simple, and accessible way for curious kids and families. From how mathematicians define extremely large numbers to why these concepts matter, this conversation sparks curiosity and encourages a love of learning in young minds.

Sources & further learning:
Thanks to Numberphile on YouTube — their video inspired this episode and explains Rayo’s number in depth: Watch here.

Main show description:

Theo Casement is a curious kid with a thirst for facts, and in this short, family-friendly podcast he explores big questions about maths, science, and how the world works through relaxed, curiosity-led conversations.

This podcast is designed to spark curiosity and a love of learning in children and families, encouraging discussion and exploration rather than formal teaching. Perfect for curious kids, parents, and educators who enjoy learning through conversation and big ideas explained simply.

Follow us on Instagram @educasement for extra resources, visuals, and topic support linked to each episode.Got a big question you’d like Theo to explore? Get in touch — we’d love to hear from you.

Fancy a shout out or would you like to make a guest appearance? Send us some details in the comments and we'll get back to you.