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2020-12-24
I couldn't get 19, so I brute forced Santa's location using what I already knew and then used that to brute force 19. Ha! (it turns out I was off on 19 by 34 - I still don't know where I went wrong)
This year's calendar was great. Thanks :)
Scott
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Off-by-one errors
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24 Hour Maths Game Show
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Approximating π
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Build your own MENACE
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Jul 2020
Happy -9+τφ 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
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2018
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Christmas cross stitch
MENACE in fiction
Christmas card 2018
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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
countdown
big internet math-off
bempp
kings
pac-man
graph theory
quadrilaterals
errors
triangles
chalkdust magazine
braiding
tmip
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edinburgh
dinosaurs
go
inverse matrices
cambridge
24 hour maths
kenilworth
signorini conditions
golden spiral
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bots
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wordle
advent calendar
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pokémon wordle
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nonograms
reddit
national lottery
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wool
weak imposition
christmas
gather town
wave scattering
turtles
geogebra
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bodmas
draughts
crosswords
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fonts
folding tube maps
news
ucl
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pi approximation day
accuracy
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hats
royal institution
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menace
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electromagnetic field
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crochet
partridge puzzle
pokémon
manchester science festival
pythagoras
latex
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recursion
mathsjam
matrix of minors
bubble bobble
frobel
databet
plastic ratio
a gamut of games
pizza cutting
data visualisation
sport
the aperiodical
rugby
alphabets
crossnumber
sound
exponential growth
logic
matrix of cofactors
pi
matrices
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programming
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runge's phenomenon
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logo
oeis
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javascript
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rust
noughts and crosses
friendly squares
games
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Archive
Show me a random blog post
▼ show ▼
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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
▼ 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 -9+τφ 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
boundary element methods
gerry anderson
anscombe's quartet
arithmetic
coins
pizza cutting
london underground
guest posts
hexapawn
games
light
squares
convergence
crochet
books
misleading statistics
statistics
palindromes
mathsteroids
hyperbolic surfaces
craft
pi
dinosaurs
video games
ucl
programming
national lottery
pi approximation day
rust
dates
draughts
trigonometry
numerical analysis
noughts and crosses
error bars
regular expressions
24 hour maths
go
friendly squares
crossnumbers
harriss spiral
weather station
standard deviation
kings
finite group
platonic solids
game of life
probability
bluesky
runge's phenomenon
braiding
mathsjam
pascal's triangle
logs
pokémon wordle
hannah fry
final fantasy
electromagnetic field
matrices
golden ratio
chalkdust magazine
databet
countdown
geogebra
advent calendar
geometry
matrix of minors
radio 4
computational complexity
christmas
bempp
weak imposition
inline code
curvature
puzzles
inverse matrices
interpolation
wordle
chess
bubble bobble
polynomials
gaussian elimination
triangles
rugby
correlation
arrangement puzzles
javascript
sound
fonts
approximation
matrix multiplication
news
football
wave scattering
royal institution
turtles
stickers
golden spiral
tennis
tetris
royal baby
a gamut of games
captain scarlet
machine learning
chebyshev
rhombicuboctahedron
matt parker
realhats
newcastle
determinants
frobel
reuleaux polygons
menace
plastic ratio
edinburgh
binary
pac-man
asteroids
python
world cup
christmas card
folding tube maps
sport
cambridge
fractals
european cup
thirteen
crossnumber
tmip
manchester
martin gardner
ternary
sobolev spaces
dataset
nonograms
cross stitch
people maths
logo
gather town
live stream
php
mathslogicbot
wool
logic
simultaneous equations
graphs
manchester science festival
youtube
talking maths in public
london
quadrilaterals
sorting
matrix of cofactors
pokémon
game show probability
data visualisation
latex
mean
datasaurus dozen
bodmas
fence posts
numbers
oeis
preconditioning
partridge puzzle
hats
warwick
errors
nine men's morris
pythagoras
phd
flexagons
zines
data
crosswords
finite element method
estimation
reddit
speed
kenilworth
folding paper
bots
coventry
dragon curves
graph theory
signorini conditions
the aperiodical
accuracy
recursion
propositional calculus
alphabets
exponential growth
map projections
raspberry pi
stirling numbers
big internet math-off
© Matthew Scroggs 2012–2026
This year's calendar was great. Thanks :)
on /blog/86