Inca Knot Numbers - Numberphile

Share this & earn $10
Numberphile
Published at : 11 Dec 2020
75636 views
4670
58

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.
Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor)
More links & stuff in full description below ↓↓↓

Check out the Language Lover's Puzzle Book) on Amazon: https://amzn.to/3oU0wjT

Or a signed version from Maths Gear: https://bit.ly/Language_Lovers

More Alex on Numberphile: http://bit.ly/Bellos_Playlist

Alex's own website with links to all his stuff: http://www.alexbellos.com

See Alex on another forgotten number system: https://youtu.be/9p55Qgt7Ciw

The Ancient Quipu - L Leland Locke: https://amzn.to/37RJfzZ

Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile

We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/

And support from Math For America - https://www.mathforamerica.org/

NUMBERPHILE
Website: http://www.numberphile.com/
Numberphile on Facebook: http://www.facebook.com/numberphile
Numberphile tweets: https://twitter.com/numberphile
Subscribe: http://bit.ly/Numberphile_Sub

Video by Brady Haran and Pete McPartlan

Patreon: http://www.patreon.com/numberphile

Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile

Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/

Brady's latest videos across all channels: http://www.bradyharanblog.com/

Thanks to these Patreon supporters:
Arjun Chakroborty
Ben Delo
Jeff Straathof
Ken Baron
Yana Chernobilsky
Andy B
James Bissonette
Jubal John
Jeremy Buchanan
Steve Crutchfield
Adam Savage
Ben White
Andrei M Burke
RAD Donato
Matthew Schuster
Nat Tyce
Ron Hochsprung
Mitch Harding
Ubiquity Ventures
Mateusz Swiatkowski
John Zelinka
Tom Marshall
Jesús Salsero
Gnare
Jordan W Oja
Tracy Parry
Ian George Walker
Arnas
Bernd Sing
Valentin
Alfred Wallace
Charles Southerland
Kristian Joensen
Bodhisattva Debnath
Alex Khein
Kermit Norlund
That Asymptote
Mirik Gogri

Sign up for (occasional) emails: http://eepurl.com/YdjL9
numberphileIncaInka

크나큰 (KNK) - SUNSET MV

크나큰 (KNK) - SUNSET MV

An Obstacle in Our Path - Xenoblade Chronicles | Super Smash Bros. Ultimate

An Obstacle in Our Path - Xenoblade Chronicles | Super Smash Bros. Ultimate

Dubai Photos That Will Make You Think Twice

Dubai Photos That Will Make You Think Twice

Boeing 737 Explodes Just After Landing | China Airlines Flight 120

Boeing 737 Explodes Just After Landing | China Airlines Flight 120

QLine SafeGuard Bookcase with secret hidden compartments

QLine SafeGuard Bookcase with secret hidden compartments

Correct spelling for preceding.

Correct spelling for preceding.

ATC - Taxation of Specialised Businesses in Nigeria

ATC - Taxation of Specialised Businesses in Nigeria

Пацанки. 5 сезон 12 выпуск

Пацанки. 5 сезон 12 выпуск

THE ONLY DRILL YOU NEED TO PERFECT THE RELEASE

THE ONLY DRILL YOU NEED TO PERFECT THE RELEASE

The Gold Exchange, A Jewellery Store in Wellington for Necklace, Bracelet and Engagement Ring

The Gold Exchange, A Jewellery Store in Wellington for Necklace, Bracelet and Engagement Ring

DIY Cat Food Dispenser from Cardboard at Home

DIY Cat Food Dispenser from Cardboard at Home

The strongest bass in the world

The strongest bass in the world

8 Peaceful Things to Do by Yourself (Productive Self-Care Hobbies!)

8 Peaceful Things to Do by Yourself (Productive Self-Care Hobbies!)

Surfaces - Keep It Gold (Official Music Video)

Surfaces - Keep It Gold (Official Music Video)

Meet The Cast: Lance

Meet The Cast: Lance

Modals of Speculation - rules and examples - (English Grammar)

Modals of Speculation - rules and examples - (English Grammar)

How To Use /Locate Effectively! On Minecraft Bedrock Edition!

How To Use /Locate Effectively! On Minecraft Bedrock Edition!

We Shall Overcome Song With Lyrics and Action for Kids || We shall Overcome Someday

We Shall Overcome Song With Lyrics and Action for Kids || We shall Overcome Someday

ENCA x DON XHONI - BREAK DOWN (Official Video 4K)

ENCA x DON XHONI - BREAK DOWN (Official Video 4K)

Caravan Palace - Lone Digger (album version, with lyrics)

Caravan Palace - Lone Digger (album version, with lyrics)

Malasakit | Ipaglaban Mo Recap

Malasakit | Ipaglaban Mo Recap

Chopped And Glued by Alexander Bergil - [Pop Music]

Chopped And Glued by Alexander Bergil - [Pop Music]

5 Advanced Rules to use Articles (an, an, the) correctly | Mistakes with Articles | English Grammar

5 Advanced Rules to use Articles (an, an, the) correctly | Mistakes with Articles | English Grammar

Entering Into Meditation

Entering Into Meditation

#29 ちゃだめ - can't / must not┃Japanese Beginner Lesson

#29 ちゃだめ - can't / must not┃Japanese Beginner Lesson

Wearing A Garment Below The Ankles Without Intending To Be Conceited | Shaykh Muḥammad Ibn Ṣāliḥ

Wearing A Garment Below The Ankles Without Intending To Be Conceited | Shaykh Muḥammad Ibn Ṣāliḥ

شرح  تطبيق تلغرام telegram ومميزاته

شرح تطبيق تلغرام telegram ومميزاته

Lilian Carp: Avem o singură soluție, alegerile anticipate

Lilian Carp: Avem o singură soluție, alegerile anticipate

Gnarls Barkley - From the Basement (Sesión Completa/Session Complete)

Gnarls Barkley - From the Basement (Sesión Completa/Session Complete)

This Hole Appeared Out Of Nowhere, Only Now Have Scientists Solved The Mystery

This Hole Appeared Out Of Nowhere, Only Now Have Scientists Solved The Mystery

Fast Registration Application: Tracking and Automatic Calibration

Fast Registration Application: Tracking and Automatic Calibration

Circle of stings quilt block-learn to sew-scrappy quilt-simple sewing

Circle of stings quilt block-learn to sew-scrappy quilt-simple sewing

This Minecraft Video Will Satisfy You [Nether Update Edition]

This Minecraft Video Will Satisfy You [Nether Update Edition]

Mindme feat. Mia Pfirrman - If I Change

Mindme feat. Mia Pfirrman - If I Change

Best Of Kygo Mix 2016   Summer Mix   Chillout Lounge Relaxing Deep House Music

Best Of Kygo Mix 2016 Summer Mix Chillout Lounge Relaxing Deep House Music

Guessing GPAs at Boston College

Guessing GPAs at Boston College

Behemoth - O Father O Satan O Sun! (Official Video)

Behemoth - O Father O Satan O Sun! (Official Video)

Good Newwz | Official Trailer | Akshay Kumar| Kareena | Diljit| Kiara | Raj Mehta  | 27th Dec

Good Newwz | Official Trailer | Akshay Kumar| Kareena | Diljit| Kiara | Raj Mehta | 27th Dec

Instant Skin Whitening Pack for Summer, Overnight Whitening at Home Urdu Hindi

Instant Skin Whitening Pack for Summer, Overnight Whitening at Home Urdu Hindi

'Problem Solvers' caucus members react to Donald Trump's Covid-19 relief bill demands

'Problem Solvers' caucus members react to Donald Trump's Covid-19 relief bill demands

Lower of Cost or Market (LCM) | Intermediate Accounting | CPA Exam FAR | Chp 9 p 1

Lower of Cost or Market (LCM) | Intermediate Accounting | CPA Exam FAR | Chp 9 p 1

Back To Basics For 3 PARA | Forces TV

Back To Basics For 3 PARA | Forces TV

Computing Devices & Types of Computers by Himanshu Thakur

Computing Devices & Types of Computers by Himanshu Thakur

DJ Khaled - For Free ft. Drake (Lyrics)

DJ Khaled - For Free ft. Drake (Lyrics)

My Top 5 Spiritual Books!

My Top 5 Spiritual Books!

Jack Harlow Goes Sneaker Shopping With Complex

Jack Harlow Goes Sneaker Shopping With Complex

A pleasant ride

A pleasant ride

types and functions of assessment

types and functions of assessment

Female possession 160

Female possession 160