Artwork for What is the Birthday Paradox?

Maths

What is the Birthday Paradox?

Episode 742 12:27

In this episode

Have you ever wondered if someone in your classroom shares your exact birthday? It feels like it would take hundreds of kids to find a match, right? Well, get ready to have your mind blown! In this episode, Mira and Finn uncover the amazing mathematical secret known as the Birthday Paradox! It turns out, if you put just twenty-three people in a room, it is more likely than not that two of them will share a birthday. How can that be true when there are 365 days in a year?! We will learn how brilliant mathematician Richard von Mises published this incredible puzzle in 1939. You will discover why our brains trick us into counting individual people instead of invisible pairs, and how the number of chances explodes super fast! A room of 23 people actually makes 253 unique pairs! We will even find out how a football pitch has exactly 23 people on it at kickoff, and how computers use this exact same maths to keep your passwords safe online. Join us to find out how coincidences that feel like absolute magic are really just hidden chances!

If you liked this one

All episodes of Maths is Not Boring

Email Debug