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2025-12-24
Thanks again for an advent full of brain teasers. Merry Christmas!
Gert-Jan
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Mathsteroids on hyperbolic surfaces
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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
Feb 2022
Build your own MENACE
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2020
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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
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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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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
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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
electromagnetic field
pythagoras
trigonometry
matrix multiplication
geogebra
final fantasy
matrix of cofactors
numbers
crosswords
golden ratio
chebyshev
pokémon wordle
preconditioning
edinburgh
arrangement puzzles
chalkdust magazine
football
stirling numbers
curvature
matrix of minors
gather town
pascal's triangle
triangles
game show probability
mathsjam
quadrilaterals
books
errors
weather station
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dinosaurs
people maths
video games
christmas
python
misleading statistics
anscombe's quartet
sound
hats
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royal institution
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golden spiral
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logo
data
interpolation
craft
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sobolev spaces
youtube
bodmas
statistics
folding paper
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thirteen
wordle
inverse matrices
puzzles
plastic ratio
rust
wool
european cup
reuleaux polygons
talking maths in public
accuracy
php
countdown
coins
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graphs
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big internet math-off
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exponential growth
news
numerical analysis
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tetris
javascript
fonts
squares
newcastle
matt parker
kings
london
folding tube maps
frobel
latex
regular expressions
bots
menace
error bars
christmas card
dragon curves
coventry
convergence
alphabets
crossnumber
weak imposition
machine learning
partridge puzzle
manchester
24 hour maths
geometry
wave scattering
gerry anderson
zines
matrices
ternary
runge's phenomenon
realhats
oeis
inline code
boundary element methods
ucl
games
palindromes
mathslogicbot
warwick
tmip
a gamut of games
radio 4
databet
harriss spiral
computational complexity
hannah fry
noughts and crosses
cross stitch
london underground
advent calendar
the aperiodical
finite group
programming
determinants
propositional calculus
royal baby
draughts
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pi
rugby
raspberry pi
finite element method
live stream
estimation
stickers
bubble bobble
manchester science festival
approximation
game of life
light
hexapawn
asteroids
rhombicuboctahedron
mean
gaussian elimination
fence posts
crossnumbers
flexagons
pac-man
sorting
tennis
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logic
fractals
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datasaurus dozen
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kenilworth
pokémon
phd
arithmetic
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braiding
crochet
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
crossnumbers
zines
inline code
pokémon wordle
electromagnetic field
big internet math-off
plastic ratio
statistics
light
cambridge
machine learning
world cup
matrix multiplication
crosswords
phd
hexapawn
coventry
computational complexity
frobel
data visualisation
boundary element methods
signorini conditions
quadrilaterals
bempp
dragon curves
news
partridge puzzle
stirling numbers
bluesky
finite group
anscombe's quartet
convergence
inverse matrices
speed
ucl
sport
logs
chebyshev
live stream
sobolev spaces
palindromes
dinosaurs
game show probability
video games
mathsteroids
pac-man
geometry
matrix of cofactors
trigonometry
rugby
raspberry pi
martin gardner
correlation
manchester
game of life
countdown
london underground
ternary
approximation
geogebra
javascript
finite element method
fractals
captain scarlet
asteroids
platonic solids
datasaurus dozen
estimation
go
recursion
24 hour maths
friendly squares
nine men's morris
exponential growth
european cup
runge's phenomenon
bodmas
wordle
final fantasy
harriss spiral
wave scattering
newcastle
probability
london
cross stitch
people maths
oeis
programming
gaussian elimination
hannah fry
alphabets
tennis
regular expressions
chess
noughts and crosses
talking maths in public
preconditioning
warwick
curvature
map projections
chalkdust magazine
squares
turtles
gather town
error bars
matrices
matt parker
youtube
golden ratio
realhats
pizza cutting
folding paper
polynomials
wool
arithmetic
dataset
draughts
determinants
royal baby
flexagons
bubble bobble
nonograms
pi
accuracy
stickers
numerical analysis
mathsjam
errors
propositional calculus
weather station
advent calendar
kings
sorting
crochet
standard deviation
guest posts
interpolation
latex
reuleaux polygons
rhombicuboctahedron
fence posts
simultaneous equations
weak imposition
graph theory
menace
coins
games
thirteen
pokémon
tmip
christmas card
pi approximation day
graphs
arrangement puzzles
books
python
bots
golden spiral
the aperiodical
football
hyperbolic surfaces
binary
data
reddit
hats
sound
pythagoras
craft
databet
puzzles
php
numbers
crossnumber
triangles
edinburgh
braiding
christmas
kenilworth
manchester science festival
logo
a gamut of games
logic
folding tube maps
mean
fonts
radio 4
gerry anderson
misleading statistics
mathslogicbot
dates
national lottery
matrix of minors
pascal's triangle
rust
tetris
royal institution
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on /blog/121