Numberphile S01E05 · 6174

Overview

6174 is also known as Kaprekar's Constant.

Torrents

Subtitles

Episodes

1. 1 1. 11.11.112011-11-08Numberphile 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 Nottingha
2. 2 2. 255 and Pac-Man2011-11-17Explaining binary to understand why Pac-Man becomes unplayable after 255 levels.
3. 3 3. 162011-11-23We 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
4. 4 4. 8128 and Perfect Numbers2011-11-28For many years, 8128 was the largest known perfect number. But what is a perfect number?
5. 5 5. 61742011-12-056174 is also known as Kaprekar's Constant.
6. 6 6. 69!2011-12-0869 is the largest number that most hand-held calculators can factorialize!
7. 7 7. 220 and 284 (Amicable Numbers)2011-12-19Why do 220 and 284 get along so well? Dr James Grime introduces us to the world of so-called amicable numbers.
8. 8 8. 15 bumfit2011-12-22Numbers can be interesting when studied in different languages and dialects - such as in Lincolnshire where we have dik, figgit and bumfit.