S2012 E1 • 153 and Narcissistic Numbers

We use 153 as an example of a narcissistic number. Video features Dr Ria Symonds from the University of Nottingham.

Première diffusion : 3 janvier 2012

S2012 E2 • 31 and Mersenne Primes

31 is one of the special Mersenne Prime numbers. They are related to perfect numbers.

Première diffusion : 9 janvier 2012

S2012 E3 • 3435

3435 is Matt Parker's "ex" favourite number - but they are still on good terms.

Première diffusion : 13 janvier 2012

S2012 E4 • 15 and Hexadecimal

Why is "f" a number to people who work with computers?

Première diffusion : 17 janvier 2012

S2012 E5 • 98 and Grafting Numbers

Square roots, strange patterns and a mysterious constant - what are Matt's "grafting numbers" all about? And why is computer programming like skydiving?

Première diffusion : 20 janvier 2012

S2012 E6 • 17 and Sudoku Clues

17 is the minimum number of clues required to give a unique sudoku solution - but how did mathematicians prove this?

Première diffusion : 24 janvier 2012

S2012 E7 • Root 2

The square root of two is a fascinating number with a long and sordid history. It also forms the basis of most office paper, such as A4, A3, etc.

Première diffusion : 27 janvier 2012

S2012 E8 • 3/4 and Kleiber's Law

The fraction three quarters has a particular interest to biologists because of its link to the research of Max Kleiber and metabolic rates in animals.

Première diffusion : 31 janvier 2012

S2012 E9 • 1 And Prime Numbers

Is 1 a prime number? Apparently not. Dr James Grime explains.

Première diffusion : 3 février 2012

S2012 E10 • 14 Super Bowl Coin Tosses

The NFC's streak of 14 Super Bowl coin toss wins has come to an end... And they aren't likely to do it again for another 32,766 years. Dr James Grime attempts to calculate how many years - on average - the NFC will wait to win another 14 in a row.

Première diffusion : 7 février 2012

S2012 E11 • 7 And Happy Numbers

7 is an example of a happy number, as opposed to sad numbers. What makes a number happy? Dr Ria Symonds is from the University of Nottingham.

Première diffusion : 10 février 2012

S2012 E12 • 23 And Football Birthdays

What's the probability that two people on the football/soccer pitch share a birthday? That's only 23 people (22 players and the ref, as long as there have been no red cards or injuries!!!) and there are 365 days in a normal year. Dr James Grime explains. Our thanks to Nottingham Forest Football Club.

Première diffusion : 14 février 2012

S2012 E13 • Googol And Googolplex

We're talking pretty big numbers here... And an interesting idea about what it'd be like traveling in a Googolplex-sized Universe! With Antonio (Tony) Padilla and Ria Symonds from the University of Nottingham.

Première diffusion : 17 février 2012

S2012 E14 • Special Magic Square

Magic squares are pretty interesting for Numberphiles any day of the week - but Roger shows us one with extra special "powers". Professor Roger Bowley works at the University of Nottingham.

Première diffusion : 21 février 2012

S2012 E15 • 145 And The Melancoil

Matt talks us through "Happification" and resulting structures it creates. Includes his fascinating Melancoil!?

Première diffusion : 26 février 2012

S2012 E16 • 1729 and Taxi Cabs

The number 1729 is "famous" among mathematicians. Why? Featuring Dr James Grime and Professor Roger Bowley. 1729 is known as the Hardy--Ramanujan number or "Taxi Cab Number".

Première diffusion : 28 février 2012

S2012 E17 • 29 And Leap Years

Astronomer Dr Meghan Gray on leap years and Julian dates. Meghan is making a "guest appearance" on Numberphile and is more familiar to viewers of our sister channels DeepSkyVideos and Sixty Symbols.

Première diffusion : 28 février 2012

S2012 E18 • 163 And Ramanujan Constant

Why does Alex Clark, from the University of Leicester, have a strange fascination with 163? Some slightly more advanced stuff in this video, including the Ramanujan Constant and its use in a "famous" April Fool's joke.

Première diffusion : 2 mars 2012

S2012 E19 • 998,001 And Its Mysterious Recurring Decimals

There has been some internet buzz about 998001, so Numberphile sheds some light on matters. This video features Dr James Grime and we mention the YouTube channel Vsauce.

Première diffusion : 6 mars 2012

S2012 E20 • 42 And Douglas Adams

Douglas Adams - who would have turned 60 on March 11 - immortalised the number 42 in The Hitchhikers Guide to the Galaxy. Forty-two was calculated by Deep Thought! In this video is James Grime, Phil Moriarty and Gerardo Adesso.

Première diffusion : 8 mars 2012

S2012 E21 • Pi

Some stuff about Pi, the "celebrity number'. This video features maths-loving author Alex Bellos (http://alexbellos.com/) and Professor Roger Bowley from the University of Nottingham.

Première diffusion : 12 mars 2012

S2012 E22 • Pi And Bouncing Balls

Professor Ed Copeland on a strange occurrence of Pi involving bouncing balls.

Première diffusion : 12 mars 2012

S2012 E23 • Pi and Buffon's Matches

Dr Tony Padilla's unique (and low budget) twist on the Buffon's Needle experiment to learn the true value of Pi.

Première diffusion : 12 mars 2012

S2012 E24 • Sounds Of Pi

Professor Philip Moriarty attributes some sounds to Pi in a discussion about its randomness and the Feynman Point.

Première diffusion : 12 mars 2012

S2012 E25 • 5 and Penrose Tiling

Première diffusion : 21 mars 2012

S2012 E26 • 13,983,816 and the Lottery

Première diffusion : 28 mars 2012

S2012 E27 • 6,000,000 and Abel Prize

Première diffusion : 30 mars 2012

S2012 E28 • 3 is everywhere

Première diffusion : 1 avril 2012

S2012 E29 • Graham's Number

Première diffusion : 4 avril 2012

S2012 E30 • Sunflowers and Fibonacci

Première diffusion : 10 avril 2012

S2012 E31 • 666

Première diffusion : 12 avril 2012

S2012 E32 • 8848

Première diffusion : 3 mai 2012

S2012 E33 • Sexy Primes

Première diffusion : 8 mai 2012

S2012 E34 • Numbers Man

Première diffusion : 12 mai 2012

S2012 E35 • What is a lucky number?

Première diffusion : 15 mai 2012

S2012 E36 • 60

Première diffusion : 18 mai 2012

S2012 E37 • How big is a billion?

Première diffusion : 24 mai 2012

S2012 E38 • 10!

Première diffusion : 28 mai 2012

S2012 E39 • Do numbers EXIST?

Première diffusion : 3 juin 2012

S2012 E40 • 32 and Truncated Icosahedron

Première diffusion : 5 juin 2012

S2012 E41 • 5, 13 and 137 are Pythagorean Primes

Première diffusion : 7 juin 2012

S2012 E42 • 14 and Shakespeare the Numbers Man

Première diffusion : 12 juin 2012

S2012 E43 • The Internet is FULL

Première diffusion : 21 juin 2012

S2012 E44 • Why do YouTube views freeze at 301?

Première diffusion : 22 juin 2012

S2012 E45 • I washed my passport

Première diffusion : 5 juillet 2012

S2012 E46 • Infinity is bigger than you think

Première diffusion : 6 juillet 2012

S2012 E47 • 27 the Favourite Number

Première diffusion : 10 juillet 2012

S2012 E48 • Golden Ratio - Making a Math Metal Anthem

Première diffusion : 11 juillet 2012

S2012 E49 • Golden Ratio Song

Première diffusion : 13 juillet 2012

S2012 E50 • The LONGEST time

Première diffusion : 18 juillet 2012