mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Comment
Comments
Comments in green were written by me. Comments in blue were not written by me.
2022-01-08
Thanks for the advert calendar this year.
By the way, in the "Hardest and easiest puzzles" section, 4 out of the 5 links to the puzzles are to the 2020 puzzles instead of the 2021 puzzles
Alex
on
/blog/93
×2
×2
×2
2022-01-09
@
Alex
: Thanks, I've fixed those links
Matthew
on
/blog/93
×2
×2
×2
×2
×2
Archive
Show me a random blog post
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 -15+3τ-φ-√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
pascal's triangle
pac-man
matt parker
python
hexapawn
matrix of minors
captain scarlet
graphs
tennis
trigonometry
zines
dinosaurs
databet
kings
platonic solids
harriss spiral
tmip
turtles
tetris
exponential growth
a gamut of games
signorini conditions
alphabets
video games
fence posts
final fantasy
sound
hannah fry
squares
probability
datasaurus dozen
hats
folding paper
dataset
logs
inverse matrices
newcastle
partridge puzzle
warwick
rust
game of life
geometry
nine men's morris
matrices
world cup
regular expressions
crossnumbers
finite element method
misleading statistics
flexagons
dates
raspberry pi
hyperbolic surfaces
bempp
dragon curves
mathsjam
approximation
pokémon
propositional calculus
wool
pythagoras
folding tube maps
london
youtube
big internet math-off
stirling numbers
runge's phenomenon
wordle
finite group
nonograms
anscombe's quartet
go
matrix multiplication
gaussian elimination
weather station
martin gardner
determinants
crossnumber
boundary element methods
light
kenilworth
craft
curvature
reuleaux polygons
computational complexity
bubble bobble
game show probability
data
royal baby
data visualisation
realhats
draughts
geogebra
radio 4
coins
preconditioning
asteroids
bluesky
chalkdust magazine
mathsteroids
puzzles
pizza cutting
pokémon wordle
sport
national lottery
reddit
statistics
news
coventry
cross stitch
24 hour maths
braiding
inline code
sorting
european cup
people maths
matrix of cofactors
pi
plastic ratio
ternary
guest posts
logic
numerical analysis
menace
fractals
thirteen
simultaneous equations
crochet
javascript
php
games
quadrilaterals
bodmas
palindromes
fonts
chebyshev
machine learning
chess
correlation
errors
phd
oeis
electromagnetic field
christmas
books
ucl
graph theory
estimation
manchester science festival
interpolation
royal institution
wave scattering
logo
edinburgh
triangles
arrangement puzzles
london underground
arithmetic
crosswords
polynomials
rhombicuboctahedron
standard deviation
golden spiral
talking maths in public
cambridge
speed
programming
stickers
friendly squares
latex
countdown
pi approximation day
sobolev spaces
recursion
noughts and crosses
numbers
gerry anderson
accuracy
the aperiodical
convergence
weak imposition
mathslogicbot
error bars
manchester
map projections
christmas card
golden ratio
bots
frobel
gather town
binary
live stream
rugby
mean
advent calendar
football
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 -15+3τ-φ-√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
oeis
gerry anderson
youtube
royal baby
fence posts
martin gardner
pascal's triangle
flexagons
radio 4
final fantasy
bots
national lottery
databet
computational complexity
recursion
the aperiodical
estimation
accuracy
squares
friendly squares
gaussian elimination
exponential growth
people maths
video games
warwick
inline code
braiding
numerical analysis
python
matrix of cofactors
golden spiral
dates
go
rugby
asteroids
crossnumbers
rust
data
dinosaurs
hannah fry
inverse matrices
royal institution
bluesky
captain scarlet
geogebra
game of life
dataset
crochet
draughts
binary
matt parker
misleading statistics
anscombe's quartet
propositional calculus
countdown
polynomials
programming
christmas
curvature
tmip
boundary element methods
pizza cutting
pythagoras
palindromes
data visualisation
logs
london
logic
talking maths in public
quadrilaterals
plastic ratio
newcastle
weather station
mathsjam
nonograms
speed
latex
noughts and crosses
mean
manchester science festival
sorting
coventry
tetris
raspberry pi
puzzles
live stream
realhats
sobolev spaces
kenilworth
chess
graphs
ternary
pokémon
electromagnetic field
craft
reuleaux polygons
correlation
bodmas
manchester
fractals
matrices
stickers
coins
crossnumber
fonts
alphabets
pi
simultaneous equations
php
numbers
logo
hyperbolic surfaces
chalkdust magazine
rhombicuboctahedron
matrix of minors
menace
guest posts
triangles
map projections
interpolation
folding tube maps
tennis
approximation
turtles
mathsteroids
light
graph theory
24 hour maths
datasaurus dozen
bempp
determinants
weak imposition
cross stitch
machine learning
geometry
dragon curves
a gamut of games
pac-man
frobel
sport
probability
stirling numbers
trigonometry
games
preconditioning
thirteen
wave scattering
european cup
game show probability
ucl
advent calendar
platonic solids
wool
christmas card
convergence
sound
books
bubble bobble
pi approximation day
crosswords
javascript
error bars
matrix multiplication
harriss spiral
golden ratio
wordle
zines
reddit
london underground
arithmetic
standard deviation
news
finite element method
runge's phenomenon
nine men's morris
gather town
finite group
football
arrangement puzzles
edinburgh
big internet math-off
cambridge
signorini conditions
pokémon wordle
chebyshev
mathslogicbot
errors
regular expressions
partridge puzzle
world cup
hexapawn
kings
folding paper
phd
hats
statistics
© Matthew Scroggs 2012–2026
By the way, in the "Hardest and easiest puzzles" section, 4 out of the 5 links to the puzzles are to the 2020 puzzles instead of the 2021 puzzles
on /blog/93