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2025-12-12
@
Matthew
: Don't worry, we'll still do them all! Thanks!
Seth Cohen
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/blog/120
Archive
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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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Jul 2020
Happy -3+τ-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
Jan 2019
Christmas (2018) is over
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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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
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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
inverse matrices
trigonometry
manchester
radio 4
logs
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speed
ternary
oeis
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hats
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preconditioning
friendly squares
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logo
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anscombe's quartet
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tmip
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pi approximation day
plastic ratio
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php
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game of life
matt parker
machine learning
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craft
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stickers
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ucl
reuleaux polygons
matrix multiplication
big internet math-off
game show probability
news
crosswords
pizza cutting
mathsjam
final fantasy
games
finite group
polynomials
databet
crossnumbers
fence posts
martin gardner
golden ratio
warwick
pac-man
inline code
coventry
logic
pokémon wordle
hyperbolic surfaces
electromagnetic field
folding paper
harriss spiral
tennis
boundary element methods
crochet
raspberry pi
numerical analysis
palindromes
gather town
standard deviation
estimation
a gamut of games
arithmetic
cross stitch
live stream
simultaneous equations
crossnumber
matrix of cofactors
arrangement puzzles
bempp
noughts and crosses
sound
the aperiodical
rust
matrix of minors
pascal's triangle
fractals
curvature
programming
reddit
probability
bubble bobble
menace
weather station
london
turtles
rugby
wave scattering
rhombicuboctahedron
london underground
exponential growth
draughts
partridge puzzle
folding tube maps
talking maths in public
graph theory
pokémon
national lottery
error bars
dates
approximation
data visualisation
kenilworth
people maths
accuracy
european cup
royal baby
javascript
interpolation
braiding
tetris
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squares
runge's phenomenon
bluesky
newcastle
christmas
recursion
youtube
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sport
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 -3+τ-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
matrix of minors
hannah fry
data
radio 4
map projections
numbers
standard deviation
folding paper
mathslogicbot
dataset
javascript
coventry
errors
palindromes
runge's phenomenon
a gamut of games
latex
error bars
triangles
simultaneous equations
ucl
pascal's triangle
coins
trigonometry
anscombe's quartet
weak imposition
logo
youtube
databet
hexapawn
christmas card
probability
machine learning
newcastle
game of life
arithmetic
datasaurus dozen
preconditioning
games
talking maths in public
european cup
bubble bobble
mathsteroids
guest posts
finite element method
big internet math-off
video games
royal institution
polynomials
matrix multiplication
electromagnetic field
draughts
live stream
wave scattering
nonograms
gaussian elimination
sport
bots
approximation
puzzles
nine men's morris
sound
computational complexity
crossnumbers
royal baby
reuleaux polygons
numerical analysis
martin gardner
signorini conditions
thirteen
braiding
wool
football
fractals
curvature
chebyshev
logic
turtles
hats
gerry anderson
pi approximation day
the aperiodical
bodmas
graphs
folding tube maps
chess
sorting
zines
plastic ratio
platonic solids
crochet
matt parker
raspberry pi
dragon curves
ternary
python
world cup
propositional calculus
sobolev spaces
gather town
flexagons
quadrilaterals
cambridge
countdown
noughts and crosses
bempp
frobel
squares
determinants
binary
edinburgh
realhats
warwick
finite group
stirling numbers
cross stitch
national lottery
asteroids
pizza cutting
matrix of cofactors
stickers
london underground
advent calendar
harriss spiral
news
boundary element methods
correlation
crosswords
final fantasy
inverse matrices
geogebra
captain scarlet
misleading statistics
pi
hyperbolic surfaces
people maths
pythagoras
oeis
friendly squares
fence posts
bluesky
manchester science festival
programming
phd
rhombicuboctahedron
fonts
dinosaurs
dates
light
golden spiral
chalkdust magazine
interpolation
rugby
game show probability
pokémon wordle
estimation
golden ratio
rust
data visualisation
reddit
crossnumber
matrices
php
tennis
recursion
christmas
speed
menace
graph theory
geometry
craft
tmip
kings
manchester
mean
weather station
regular expressions
accuracy
mathsjam
inline code
pokémon
exponential growth
24 hour maths
kenilworth
arrangement puzzles
pac-man
convergence
books
logs
go
alphabets
statistics
london
partridge puzzle
tetris
wordle
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on /blog/120