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2025-06-09
One day a sentient super general AI is going to stumble upon this page and consider it the origin of life.
Mark Hartnady
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/blog/19
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Chalkdust issue 17
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The databet
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Off-by-one errors
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24 Hour Maths Game Show
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Approximating π
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Build your own MENACE
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Close encounters of the second kind
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Jul 2020
Happy -24+eτ+g-φ Approximation Day!
May 2020
A surprising fact about quadrilaterals
Interesting tautologies
Mar 2020
Log-scaled axes
Feb 2020
PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2
Jan 2020
PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
2019
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Dec 2019
Visualising MENACE's learning
Christmas card 2019
Nov 2019
Christmas (2019) is coming!
Sep 2019
A non-converging LaTeX document
TMiP 2019 treasure punt
Jul 2019
Big Internet Math-Off stickers 2019
Jun 2019
Proving a conjecture
Apr 2019
Harriss and other spirals
Mar 2019
realhats
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2018
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Christmas cross stitch
MENACE in fiction
Christmas card 2018
Nov 2018
Christmas (2018) is coming!
Sep 2018
Runge's Phenomenon
Jul 2018
World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
Mar 2018
A 20,000-to-1 baby?
World Cup stickers 2018
Jan 2018
Origins of World War I
Christmas (2017) is over
2017
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Dec 2017
Christmas card 2017
Nov 2017
Christmas (2017) is coming!
MENACE at Manchester Science Festival
Jun 2017
Big Ben Strikes Again
Mar 2017
The end of coins of constant width
Dragon curves II
Feb 2017
The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
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Dec 2016
Christmas (2016) is over
Video game surfaces
Christmas card 2016
Nov 2016
Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
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Nov 2015
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Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
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Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
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Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
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Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
flexagons
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puzzles
mathslogicbot
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harriss spiral
braiding
signorini conditions
convergence
approximation
matrices
logs
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zines
hexapawn
hyperbolic surfaces
arrangement puzzles
talking maths in public
world cup
dinosaurs
manchester
light
game show probability
sound
fractals
books
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matrix multiplication
christmas card
hannah fry
noughts and crosses
sobolev spaces
propositional calculus
warwick
matrix of cofactors
regular expressions
reuleaux polygons
pokémon
wool
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pythagoras
sorting
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partridge puzzle
frobel
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anscombe's quartet
javascript
errors
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24 hour maths
recursion
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palindromes
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speed
final fantasy
wave scattering
programming
realhats
logo
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pi
cross stitch
polynomials
craft
bodmas
rugby
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kenilworth
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hats
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nine men's morris
guest posts
trigonometry
pi approximation day
squares
numbers
tennis
bempp
dataset
data
finite group
draughts
interpolation
map projections
golden spiral
coventry
the aperiodical
chebyshev
friendly squares
people maths
runge's phenomenon
pascal's triangle
big internet math-off
databet
martin gardner
video games
coins
misleading statistics
wordle
plastic ratio
edinburgh
newcastle
gaussian elimination
tetris
advent calendar
royal baby
captain scarlet
weather station
turtles
triangles
a gamut of games
asteroids
youtube
countdown
curvature
go
probability
dragon curves
exponential growth
folding tube maps
bots
oeis
dates
kings
pizza cutting
rhombicuboctahedron
ucl
cambridge
platonic solids
tmip
london underground
inline code
matrix of minors
thirteen
finite element method
mathsteroids
numerical analysis
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fence posts
data visualisation
weak imposition
binary
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gerry anderson
crossnumber
crossnumbers
game of life
menace
electromagnetic field
folding paper
preconditioning
latex
standard deviation
php
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2026
May 2026
World Cup stickers 2026
Apr 2026
A new puzzle every day
Mixing Wordle with other games
Feb 2026
Christmas (2025) is over
2025
Dec 2025
Christmas card 2025
Nov 2025
Christmas (2025) is coming!
Sep 2025
The partridge puzzle
Aug 2025
TMiP 2025 puzzle hunt
Jun 2025
A nonogram alphabet
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
Dec 2024
A regular expression Christmas puzzle
Christmas card 2024
Nov 2024
Christmas (2024) is coming!
Feb 2024
Zines, pt. 2
Jan 2024
Christmas (2023) is over
2023
▼ show ▼
▲ hide ▲
Dec 2023
Christmas card 2023
Nov 2023
Christmas (2023) is coming!
Zines
Sep 2023
TMiP 2023 puzzle hunt
May 2023
Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
▼ show ▼
▲ hide ▲
Dec 2022
Off-by-one errors
Christmas card 2022
Nov 2022
Christmas (2022) is coming!
Oct 2022
24 Hour Maths Game Show
Mar 2022
Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
▼ show ▼
▲ hide ▲
Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
Sep 2021
TMiP 2021 puzzle hunt
May 2021
Close encounters of the second kind
Jan 2021
Christmas (2020) is over
2020
▼ show ▼
▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -24+eτ+g-φ Approximation Day!
May 2020
A surprising fact about quadrilaterals
Interesting tautologies
Mar 2020
Log-scaled axes
Feb 2020
PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2
Jan 2020
PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
2019
▼ show ▼
▲ hide ▲
Dec 2019
Visualising MENACE's learning
Christmas card 2019
Nov 2019
Christmas (2019) is coming!
Sep 2019
A non-converging LaTeX document
TMiP 2019 treasure punt
Jul 2019
Big Internet Math-Off stickers 2019
Jun 2019
Proving a conjecture
Apr 2019
Harriss and other spirals
Mar 2019
realhats
Jan 2019
Christmas (2018) is over
2018
▼ show ▼
▲ hide ▲
Dec 2018
Christmas cross stitch
MENACE in fiction
Christmas card 2018
Nov 2018
Christmas (2018) is coming!
Sep 2018
Runge's Phenomenon
Jul 2018
World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
Mar 2018
A 20,000-to-1 baby?
World Cup stickers 2018
Jan 2018
Origins of World War I
Christmas (2017) is over
2017
▼ show ▼
▲ hide ▲
Dec 2017
Christmas card 2017
Nov 2017
Christmas (2017) is coming!
MENACE at Manchester Science Festival
Jun 2017
Big Ben Strikes Again
Mar 2017
The end of coins of constant width
Dragon curves II
Feb 2017
The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
▼ show ▼
▲ hide ▲
Dec 2016
Christmas (2016) is over
Video game surfaces
Christmas card 2016
Nov 2016
Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
▼ show ▼
▲ hide ▲
Nov 2015
Christmas (2015) is coming!
Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
▼ show ▼
▲ hide ▲
Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
▼ show ▼
▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
▼ show ▼
▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
gaussian elimination
gerry anderson
accuracy
books
nine men's morris
regular expressions
matrix of cofactors
crossnumbers
mathsjam
reddit
kings
matrix multiplication
video games
folding tube maps
thirteen
programming
light
coventry
datasaurus dozen
live stream
bots
golden ratio
inline code
polynomials
manchester science festival
arithmetic
speed
national lottery
sound
sorting
zines
hannah fry
signorini conditions
interpolation
pi approximation day
ucl
machine learning
news
final fantasy
realhats
weather station
countdown
graph theory
football
hyperbolic surfaces
game of life
captain scarlet
partridge puzzle
simultaneous equations
christmas card
24 hour maths
coins
recursion
nonograms
rugby
crochet
approximation
asteroids
pi
weak imposition
rust
chebyshev
wordle
hats
fractals
folding paper
chess
hexapawn
standard deviation
bempp
pokémon
phd
world cup
numerical analysis
correlation
latex
warwick
menace
estimation
rhombicuboctahedron
plastic ratio
geometry
friendly squares
computational complexity
stirling numbers
dragon curves
kenilworth
data
anscombe's quartet
mathslogicbot
raspberry pi
chalkdust magazine
advent calendar
finite group
stickers
royal institution
fence posts
geogebra
reuleaux polygons
boundary element methods
errors
tennis
bubble bobble
pac-man
royal baby
turtles
electromagnetic field
propositional calculus
binary
quadrilaterals
golden spiral
sport
game show probability
london
braiding
youtube
statistics
edinburgh
palindromes
graphs
arrangement puzzles
christmas
matrix of minors
dinosaurs
dates
puzzles
manchester
alphabets
probability
runge's phenomenon
cambridge
oeis
mathsteroids
platonic solids
go
dataset
map projections
fonts
data visualisation
european cup
wave scattering
misleading statistics
tmip
exponential growth
matt parker
newcastle
bodmas
draughts
pascal's triangle
inverse matrices
games
the aperiodical
pokémon wordle
sobolev spaces
logic
cross stitch
people maths
python
error bars
preconditioning
talking maths in public
databet
crosswords
tetris
wool
a gamut of games
matrices
bluesky
convergence
gather town
triangles
big internet math-off
javascript
curvature
radio 4
guest posts
noughts and crosses
php
pizza cutting
harriss spiral
logs
squares
london underground
frobel
numbers
determinants
trigonometry
crossnumber
finite element method
logo
flexagons
mean
martin gardner
ternary
pythagoras
craft
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on /blog/19