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Comments in green were written by me. Comments in blue were not written by me.
2025-12-25
Oh my goodness, this was so fun! Thanks for putting this together, I've never done it before but I think I'm gonna have to start doing it every year. 21 was a beast (my favourite though) and 19 was incredibly sneaky, but forshadowed excellently.
Robert
on
/blog/120
Archive
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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
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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
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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 -62+e+gτ-√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
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▲ 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
machine learning
talking maths in public
rust
fonts
graph theory
matrix of minors
triangles
bubble bobble
runge's phenomenon
pizza cutting
zines
cambridge
latex
royal institution
hyperbolic surfaces
games
london underground
puzzles
mathsteroids
python
news
gerry anderson
hats
kings
tetris
menace
national lottery
anscombe's quartet
pokémon
big internet math-off
pac-man
boundary element methods
inline code
fence posts
probability
live stream
bodmas
pi approximation day
flexagons
dinosaurs
php
draughts
matt parker
matrix of cofactors
speed
light
turtles
logo
simultaneous equations
ucl
christmas card
logs
gather town
sorting
correlation
trigonometry
pythagoras
noughts and crosses
weather station
crochet
preconditioning
thirteen
pascal's triangle
sound
game of life
crossnumber
bempp
javascript
manchester
ternary
video games
wool
golden ratio
quadrilaterals
dataset
london
matrices
bluesky
rhombicuboctahedron
data visualisation
radio 4
finite element method
mathsjam
finite group
a gamut of games
pi
phd
hexapawn
gaussian elimination
pokémon wordle
harriss spiral
folding tube maps
regular expressions
tmip
dates
logic
manchester science festival
golden spiral
interpolation
geometry
binary
edinburgh
platonic solids
sport
numerical analysis
craft
alphabets
dragon curves
game show probability
24 hour maths
nine men's morris
mathslogicbot
newcastle
wordle
arrangement puzzles
the aperiodical
crossnumbers
frobel
standard deviation
rugby
world cup
christmas
tennis
weak imposition
matrix multiplication
inverse matrices
mean
reddit
go
football
statistics
geogebra
exponential growth
guest posts
palindromes
curvature
martin gardner
propositional calculus
kenilworth
nonograms
determinants
programming
graphs
youtube
electromagnetic field
squares
final fantasy
coventry
european cup
asteroids
computational complexity
cross stitch
advent calendar
braiding
convergence
stickers
sobolev spaces
plastic ratio
accuracy
polynomials
numbers
crosswords
signorini conditions
misleading statistics
bots
datasaurus dozen
chess
coins
realhats
data
royal baby
wave scattering
oeis
chebyshev
reuleaux polygons
recursion
errors
stirling numbers
books
raspberry pi
countdown
fractals
folding paper
friendly squares
warwick
captain scarlet
map projections
error bars
partridge puzzle
approximation
hannah fry
estimation
databet
chalkdust magazine
people maths
arithmetic
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 -62+e+gτ-√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
bempp
standard deviation
reuleaux polygons
manchester science festival
frobel
recursion
correlation
triangles
royal institution
menace
mean
final fantasy
preconditioning
statistics
fractals
world cup
gerry anderson
dinosaurs
graphs
nine men's morris
friendly squares
platonic solids
dates
logo
rust
realhats
matrix of cofactors
finite group
martin gardner
python
matrix of minors
weather station
asteroids
football
speed
harriss spiral
pokémon
reddit
probability
estimation
stickers
bluesky
propositional calculus
error bars
sobolev spaces
quadrilaterals
folding paper
noughts and crosses
tmip
matrix multiplication
flexagons
runge's phenomenon
accuracy
news
javascript
trigonometry
dataset
tetris
numbers
computational complexity
determinants
pi approximation day
raspberry pi
fonts
24 hour maths
logs
royal baby
kings
weak imposition
coins
php
pac-man
captain scarlet
radio 4
sound
cambridge
pokémon wordle
pizza cutting
hyperbolic surfaces
palindromes
guest posts
sorting
gaussian elimination
bots
crossnumbers
hats
signorini conditions
arithmetic
curvature
hexapawn
people maths
crossnumber
wordle
mathsjam
newcastle
turtles
simultaneous equations
datasaurus dozen
ternary
pi
talking maths in public
graph theory
chess
european cup
youtube
interpolation
nonograms
arrangement puzzles
go
edinburgh
gather town
mathsteroids
alphabets
thirteen
coventry
ucl
geogebra
inverse matrices
game of life
dragon curves
warwick
national lottery
databet
polynomials
binary
light
craft
live stream
big internet math-off
pythagoras
hannah fry
draughts
partridge puzzle
boundary element methods
games
anscombe's quartet
tennis
data
sport
machine learning
matt parker
wave scattering
braiding
errors
programming
folding tube maps
chebyshev
data visualisation
manchester
the aperiodical
plastic ratio
rugby
golden spiral
fence posts
kenilworth
inline code
numerical analysis
books
approximation
mathslogicbot
oeis
game show probability
zines
latex
wool
christmas card
squares
cross stitch
matrices
map projections
london
countdown
convergence
advent calendar
chalkdust magazine
geometry
electromagnetic field
a gamut of games
logic
crochet
video games
misleading statistics
golden ratio
crosswords
exponential growth
bodmas
christmas
bubble bobble
phd
stirling numbers
london underground
rhombicuboctahedron
puzzles
finite element method
pascal's triangle
regular expressions
© Matthew Scroggs 2012–2026
on /blog/120