How many people need to be crowded into a room before two of them are likely to have the same birthday? The answer is a mere 23 to have a fifty-fifty shot. To bring the probability to ninety-nine ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. The birthday paradox is a beautiful piece of counter-intuitive mathematics. The answer is not what you ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

If the birthday paradox is true, 50% of the squads should have shared birthdays. Using the birthdays from Fifa's official squad lists as of Tuesday 10 June, it turns out there are indeed 16 teams with ...

Strange as it may sound, 16 of the 32 teams at the World Cup have players who share a birthday. TOKYO: Mathematicians are running the rule over the World Cup – less for the quality of the football ...

It's puzzling but true that in any group of 23 people there is a 50% chance that two share a birthday. At the World Cup in Brazil there are 32 squads, each of 23 people... so do they demonstrate the ...

Here's a fun brain teaser: How large does a random group of people have to be for there to be a 50% chance that at least two of the people will share a birthday? The answer is 23, which surprises many ...