Season 1

Épisode 1

S1 · E1 · 08/11/2011

11.11.11

Numberphile video about number 11, marking the last binary day of a generation: 11.11.11. Exploring barcodes, check digits and CD technology. Filmed at the home ground of Nottingham Forest Football Club, The City Ground.

Épisode 2

S1 · E2 · 17/11/2011

255 and Pac-Man

Explaining binary to understand why Pac-Man becomes unplayable after 255 levels.

Épisode 3

S1 · E3 · 23/11/2011

16

We discuss the number 16 - a perfect square - and how sitting at table 16 led to something bigger for Matt Parker. In this video is Dr Ria Symonds from the University of Nottingham.

Épisode 4

S1 · E4 · 28/11/2011

8128 and Perfect Numbers

For many years, 8128 was the largest known perfect number. But what is a perfect number?

Épisode 5

S1 · E5 · 05/12/2011

6174

6174 is also known as Kaprekar's Constant.

Épisode 6

S1 · E6 · 08/12/2011

69!

69 is the largest number that most hand-held calculators can factorialize!

Épisode 7

S1 · E7 · 19/12/2011

220 and 284 (Amicable Numbers)

Why do 220 and 284 get along so well? Dr James Grime introduces us to the world of so-called amicable numbers.

Épisode 8

S1 · E8 · 22/12/2011

15 bumfit

Numbers can be interesting when studied in different languages and dialects - such as in Lincolnshire where we have dik, figgit and bumfit.