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Comments
Comments in green were written by me. Comments in blue were not written by me.
2023-12-27
I think this is at least my 9th year solving the math(s) advent calendar, and as always I enjoyed it a lot! Thanks so much, Matthew!
Jessica Marsh
on
/blog/107
×1
2023-12-27
@
Jessica Marsh
: it's also at most the 9th year as I've only been doing it for 9 years!
Matthew
on
/blog/107
Archive
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Christmas card 2025
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Jun 2025
A nonogram alphabet
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How to write a crossnumber
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Christmas (2024) is over
Friendly squares
2024
Dec 2024
A regular expression Christmas puzzle
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Christmas (2024) is coming!
Feb 2024
Zines, pt. 2
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2023
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Christmas (2023) is coming!
Zines
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TMiP 2023 puzzle hunt
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Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
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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
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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
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Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -4-φ-√2+5√3 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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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
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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
▼ 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
chalkdust magazine
arrangement puzzles
map projections
bluesky
signorini conditions
friendly squares
fonts
graph theory
gaussian elimination
news
fence posts
binary
a gamut of games
manchester science festival
talking maths in public
24 hour maths
noughts and crosses
approximation
golden ratio
london underground
mathslogicbot
standard deviation
golden spiral
electromagnetic field
sound
regular expressions
accuracy
light
frobel
platonic solids
inline code
countdown
weather station
recursion
realhats
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logo
tetris
pokémon
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gather town
turtles
coins
python
cross stitch
matrices
curvature
games
newcastle
pizza cutting
runge's phenomenon
wordle
advent calendar
warwick
bots
pi approximation day
interpolation
correlation
inverse matrices
dataset
geogebra
stickers
kings
convergence
live stream
crossnumbers
puzzles
guest posts
radio 4
crochet
world cup
squares
numerical analysis
wave scattering
european cup
datasaurus dozen
reddit
hexapawn
weak imposition
royal institution
harriss spiral
triangles
dragon curves
rhombicuboctahedron
edinburgh
christmas card
matrix of minors
wool
plastic ratio
christmas
oeis
hyperbolic surfaces
bodmas
mathsjam
finite element method
geometry
london
reuleaux polygons
braiding
logs
matrix multiplication
exponential growth
data visualisation
crosswords
thirteen
logic
phd
folding tube maps
raspberry pi
go
youtube
sport
data
partridge puzzle
zines
royal baby
fractals
books
mathsteroids
folding paper
tennis
estimation
dates
databet
video games
programming
coventry
dinosaurs
hats
nine men's morris
craft
probability
sorting
rugby
javascript
nonograms
preconditioning
computational complexity
tmip
pac-man
martin gardner
speed
football
alphabets
kenilworth
big internet math-off
bempp
chess
game of life
pokémon wordle
draughts
people maths
latex
rust
ucl
polynomials
pythagoras
errors
php
graphs
numbers
matrix of cofactors
palindromes
statistics
anscombe's quartet
asteroids
chebyshev
crossnumber
flexagons
boundary element methods
manchester
misleading statistics
menace
pi
ternary
gerry anderson
pascal's triangle
propositional calculus
bubble bobble
final fantasy
quadrilaterals
sobolev spaces
matt parker
error bars
the aperiodical
determinants
national lottery
trigonometry
mean
hannah fry
cambridge
captain scarlet
finite group
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 -4-φ-√2+5√3 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
crochet
people maths
matrix of minors
mean
wave scattering
a gamut of games
computational complexity
cambridge
boundary element methods
map projections
cross stitch
misleading statistics
final fantasy
arithmetic
databet
golden spiral
geogebra
rugby
trigonometry
numerical analysis
squares
nine men's morris
numbers
datasaurus dozen
game of life
speed
inverse matrices
error bars
chalkdust magazine
national lottery
harriss spiral
rhombicuboctahedron
dragon curves
pythagoras
wool
draughts
london underground
preconditioning
menace
curvature
interpolation
nonograms
rust
european cup
asteroids
video games
captain scarlet
frobel
graph theory
golden ratio
triangles
electromagnetic field
pi
machine learning
bodmas
partridge puzzle
tennis
accuracy
craft
propositional calculus
newcastle
royal institution
coins
recursion
polynomials
quadrilaterals
martin gardner
weak imposition
games
christmas card
hexapawn
reuleaux polygons
fence posts
zines
stickers
weather station
standard deviation
football
python
estimation
go
logic
platonic solids
bubble bobble
dinosaurs
sport
wordle
noughts and crosses
guest posts
sound
convergence
flexagons
braiding
geometry
fonts
matrix of cofactors
pac-man
crossnumber
mathslogicbot
talking maths in public
matt parker
hyperbolic surfaces
realhats
folding paper
news
regular expressions
phd
logs
the aperiodical
logo
thirteen
gaussian elimination
chebyshev
palindromes
javascript
live stream
gather town
plastic ratio
matrix multiplication
alphabets
determinants
coventry
friendly squares
radio 4
bluesky
pi approximation day
london
finite element method
fractals
mathsjam
tetris
manchester
kings
manchester science festival
crosswords
tmip
world cup
light
turtles
hats
pokémon
hannah fry
kenilworth
big internet math-off
errors
dataset
raspberry pi
pokémon wordle
folding tube maps
dates
finite group
oeis
graphs
php
reddit
books
arrangement puzzles
pascal's triangle
countdown
bempp
statistics
runge's phenomenon
approximation
advent calendar
simultaneous equations
mathsteroids
gerry anderson
warwick
inline code
exponential growth
game show probability
christmas
sobolev spaces
youtube
programming
royal baby
bots
matrices
correlation
data visualisation
24 hour maths
sorting
crossnumbers
ternary
stirling numbers
edinburgh
ucl
data
puzzles
anscombe's quartet
signorini conditions
probability
latex
binary
pizza cutting
chess
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on /blog/107