Numberphile

The Unsolved Lollipop Problem – Numberphile

Science · May 27, 2026

41

The Immortal Kangaroo Sequence – Numberphile

Science · September 4, 2026

42

07:09

Liar Numbers – Numberphile

Science · February 3, 2014

747 425

43

26:36

Epic Circles – Numberphile

Science · April 13, 2014

1 831 925

44

07:49

Mathematical Way to Choose a Toilet

Science · June 26, 2014

995 425

45

08:11

Friedman Numbers – Numberphile

Science · September 12, 2014

210 525

46

07:09

Wrong Turn on the Dragon – Numberphile

Science · December 30, 2014

339 600

47

01:54

1 to 200 on Google Image Search – Numberphile

Science · March 20, 2015

236 300

48

14:22

Funny Fractions and Ford Circles – Numberphile

Science · June 9, 2015

403 225

49

06:56

Prime Knots – Numberphile

Science · August 10, 2015

175 225

50

08:29

The Uncracked Problem with 33 – Numberphile

Science · November 6, 2015

1 214 475

51

10:38

The Mathematics of Crime and Terrorism – Numberphile

Science · February 3, 2016

539 400

52

09:44

The Last Digit of Prime Numbers – Numberphile

Science · May 4, 2016

518 300

53

06:42

The Prime Problem with a One Sentence Proof – Numberphile

Science · July 18, 2016

313 250

54

09:03

Space-Filling Curves – Numberphile

Science · September 26, 2016

370 600

55

18:55

Why 4.669 is famous? – Numberphile

Science · January 16, 2017

545 550

56

03:30

Reflected Cats – Numberphile

Science · April 7, 2017

287 625

57

13:53

Math vs Physics – Numberphile

Science · June 28, 2017

649 475

58

10:00

Fibonacci Numbers hidden in the Mandelbrot Set – Numberphile

Science · October 5, 2017

590 375

59

16:12

River Crossings (and Alcuin Numbers) – Numberphile

Science · January 5, 2018

307 825

60

08:57

Neon Knots and Borromean Beer Rings – Numberphile

Science · April 9, 2018

130 825

61

16:19

The Cross Ratio – Numberphile

Science · July 6, 2018

231 975

62

12:11

The Best Way to Pack Spheres – Numberphile

Science · September 24, 2018

389 775

63

07:45

1010011010 – Numberphile

Science · February 11, 2019

255 000

64

18:36

Game of Cat and Mouse – Numberphile

Science · May 28, 2019

714 525

65

12:31

The Forgotten Flexagon – Numberphile

Science · October 17, 2019

168 200

66

11:14

Colouring Numbers – Numberphile

Science · January 21, 2020

131 775

67

09:05

Mesolabe Compass and Square Roots – Numberphile

Science · March 15, 2020

57 750

68

16:34

Matrix Factorization – Numberphile

Science · May 16, 2020

77 625

69

The Forgotten Number System – Numberphile

Science · November 5, 2020

70

Gabriel’s Horn Paradox – Numberphile

Science · February 18, 2021

71

Chaotic Balls (and other animations) – Numberphile

Science · July 24, 2021

72

The Doomsday Algorithm – Numberphile

Science · October 31, 2021

73

Tunnelling through a Mountain – Numberphile

Science · January 23, 2022

74

Drawing an Egg (with a Pentagon) – Numberphile

Science · April 16, 2022

75

The Dumbest Way To Solve A Maze – Numberphile

Science · September 11, 2022

76

Triangle Subdivision – Numberphile

Science · February 9, 2023

77

Winnie the Math Whiz (with Danica McKellar) – Numberphile

Science · July 2, 2024

78

The Change from Roman Numerals – Numberphile

Science · November 7, 2024

79

The Tea Lady Experiment – Numberphile

Science · April 15, 2025

80