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Comments in green were written by me. Comments in blue were not written by me.
2022-12-25
This was a lot of fun - thank you so much for the time and effort that went into this.
Each puzzle was tricky enough to require some thought, but not so tricky as to be discouraging.
Looking forward to next year already!
Si E
on
/blog/91
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Archive
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2025
Mar 2025
How to write a crossnumber
Jan 2025
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Friendly squares
2024
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A regular expression Christmas puzzle
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Christmas (2024) is coming!
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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 -21+4e+g√2 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 ▼
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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
▼ 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
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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
▼ show ▼
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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
geogebra
a gamut of games
friendly squares
captain scarlet
manchester
logic
football
probability
chess
crochet
zines
noughts and crosses
approximation
speed
game show probability
cambridge
electromagnetic field
data
matrices
data visualisation
chalkdust magazine
dragon curves
quadrilaterals
anscombe's quartet
matrix of cofactors
weak imposition
harriss spiral
standard deviation
coins
london
countdown
platonic solids
game of life
plastic ratio
christmas
hats
stickers
talking maths in public
braiding
programming
dates
finite group
polynomials
squares
edinburgh
frobel
realhats
stirling numbers
error bars
martin gardner
national lottery
arithmetic
sobolev spaces
correlation
24 hour maths
cross stitch
reddit
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guest posts
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gerry anderson
gaussian elimination
tennis
triangles
ternary
chebyshev
latex
reuleaux polygons
hannah fry
news
fonts
misleading statistics
royal institution
sound
statistics
bots
nine men's morris
raspberry pi
phd
mathsjam
wool
exponential growth
books
python
pizza cutting
runge's phenomenon
fractals
asteroids
sorting
folding paper
menace
pi approximation day
matrix of minors
graph theory
inline code
estimation
mathsteroids
video games
bodmas
simultaneous equations
pythagoras
rugby
draughts
mathslogicbot
hyperbolic surfaces
curvature
crossnumbers
errors
propositional calculus
final fantasy
the aperiodical
boundary element methods
rhombicuboctahedron
map projections
mean
computational complexity
go
accuracy
numerical analysis
wave scattering
christmas card
royal baby
radio 4
finite element method
interpolation
manchester science festival
javascript
light
machine learning
databet
puzzles
bubble bobble
turtles
datasaurus dozen
graphs
dinosaurs
convergence
geometry
logs
fence posts
advent calendar
ucl
newcastle
gather town
palindromes
inverse matrices
dataset
live stream
golden ratio
numbers
hexapawn
matt parker
flexagons
people maths
crosswords
golden spiral
matrix multiplication
weather station
games
php
world cup
youtube
tmip
kings
big internet math-off
craft
sport
determinants
london underground
recursion
pi
preconditioning
oeis
bempp
trigonometry
pac-man
logo
pascal's triangle
folding tube maps
regular expressions
signorini conditions
binary
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2025
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
▼ show ▼
▲ hide ▲
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 -21+4e+g√2 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
reuleaux polygons
geometry
sport
approximation
golden spiral
tmip
wool
mathslogicbot
hannah fry
london underground
map projections
weak imposition
palindromes
cambridge
runge's phenomenon
pizza cutting
preconditioning
draughts
noughts and crosses
dinosaurs
determinants
gaussian elimination
braiding
rhombicuboctahedron
phd
matrices
newcastle
binary
finite element method
signorini conditions
golden ratio
data
24 hour maths
correlation
trigonometry
electromagnetic field
royal baby
manchester
friendly squares
craft
reddit
big internet math-off
flexagons
machine learning
coins
zines
youtube
royal institution
errors
datasaurus dozen
data visualisation
crosswords
pac-man
bodmas
news
captain scarlet
statistics
christmas
oeis
databet
tennis
numerical analysis
misleading statistics
nine men's morris
fractals
programming
numbers
boundary element methods
matrix multiplication
quadrilaterals
guest posts
regular expressions
hexapawn
harriss spiral
php
finite group
estimation
chebyshev
sound
python
countdown
ucl
hats
computational complexity
final fantasy
standard deviation
kings
mathsjam
matt parker
plastic ratio
propositional calculus
speed
convergence
inverse matrices
raspberry pi
sorting
graph theory
fence posts
interpolation
bubble bobble
arithmetic
gather town
javascript
latex
curvature
dragon curves
logo
frobel
logs
pi
accuracy
christmas card
sobolev spaces
chess
exponential growth
hyperbolic surfaces
world cup
gerry anderson
books
game of life
geogebra
cross stitch
simultaneous equations
people maths
mean
football
stirling numbers
radio 4
folding paper
recursion
polynomials
dates
folding tube maps
asteroids
inline code
squares
pi approximation day
manchester science festival
national lottery
error bars
matrix of cofactors
european cup
bempp
chalkdust magazine
advent calendar
pascal's triangle
stickers
crochet
dataset
graphs
video games
platonic solids
crossnumbers
rugby
martin gardner
realhats
pythagoras
logic
edinburgh
weather station
the aperiodical
triangles
fonts
go
matrix of minors
turtles
game show probability
mathsteroids
bots
talking maths in public
wave scattering
menace
light
a gamut of games
live stream
puzzles
crossnumber
probability
games
ternary
london
anscombe's quartet
© Matthew Scroggs 2012–2025
Each puzzle was tricky enough to require some thought, but not so tricky as to be discouraging.
Looking forward to next year already!
on /blog/91