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.
2022-12-25
It says I have all days correct but I ran into a contradiction with one of the drones speed. :( is there any way to check?
Lyra
on
/blog/97
×1
×1
×1
×1
×1
Archive
Show me a random blog post
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 3+sin(φ) 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
data visualisation
sport
the aperiodical
dinosaurs
binary
captain scarlet
bodmas
chalkdust magazine
game show probability
estimation
anscombe's quartet
numerical analysis
crossnumber
databet
mathslogicbot
standard deviation
crossnumbers
countdown
talking maths in public
gather town
pizza cutting
sobolev spaces
dates
sorting
a gamut of games
royal baby
hexapawn
craft
rhombicuboctahedron
asteroids
books
platonic solids
javascript
wave scattering
zines
exponential growth
data
inline code
wool
hyperbolic surfaces
regular expressions
gaussian elimination
matrix of minors
graph theory
python
european cup
speed
game of life
errors
oeis
fractals
bempp
people maths
noughts and crosses
royal institution
latex
propositional calculus
fonts
boundary element methods
cross stitch
chess
sound
approximation
runge's phenomenon
plastic ratio
reuleaux polygons
frobel
cambridge
convergence
quadrilaterals
turtles
chebyshev
dragon curves
pi
christmas
correlation
flexagons
bots
recursion
martin gardner
pi approximation day
logic
triangles
youtube
braiding
guest posts
hats
numbers
polynomials
logs
stirling numbers
video games
graphs
golden spiral
crochet
weather station
finite element method
radio 4
tennis
puzzles
matt parker
map projections
football
geometry
friendly squares
realhats
dataset
probability
world cup
finite group
matrices
statistics
simultaneous equations
fence posts
final fantasy
advent calendar
games
national lottery
raspberry pi
curvature
machine learning
matrix multiplication
manchester science festival
signorini conditions
logo
mean
trigonometry
folding paper
squares
go
ucl
coins
arithmetic
newcastle
inverse matrices
computational complexity
edinburgh
matrix of cofactors
determinants
big internet math-off
electromagnetic field
weak imposition
geogebra
crosswords
reddit
gerry anderson
php
misleading statistics
pac-man
preconditioning
bubble bobble
phd
light
tmip
accuracy
nine men's morris
pythagoras
error bars
interpolation
hannah fry
live stream
programming
pascal's triangle
london underground
menace
folding tube maps
stickers
mathsjam
ternary
datasaurus dozen
manchester
rugby
mathsteroids
draughts
kings
palindromes
christmas card
golden ratio
24 hour maths
london
news
harriss spiral
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 3+sin(φ) 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
trigonometry
wave scattering
inline code
correlation
national lottery
sport
crosswords
frobel
standard deviation
speed
graph theory
menace
talking maths in public
tmip
regular expressions
mathsteroids
advent calendar
pi
logs
friendly squares
sorting
latex
pizza cutting
plastic ratio
data
world cup
arithmetic
martin gardner
noughts and crosses
gather town
nine men's morris
squares
newcastle
polynomials
pi approximation day
graphs
gaussian elimination
captain scarlet
geometry
braiding
oeis
dates
stickers
palindromes
matrices
puzzles
london underground
christmas card
numerical analysis
realhats
golden ratio
cambridge
chalkdust magazine
game of life
craft
logo
geogebra
logic
game show probability
mathslogicbot
turtles
reuleaux polygons
hannah fry
cross stitch
chess
programming
pythagoras
numbers
the aperiodical
data visualisation
error bars
map projections
sound
crochet
sobolev spaces
weak imposition
chebyshev
stirling numbers
live stream
crossnumber
fractals
books
asteroids
accuracy
runge's phenomenon
anscombe's quartet
wool
determinants
european cup
rugby
misleading statistics
hexapawn
convergence
phd
matrix multiplication
preconditioning
matt parker
rhombicuboctahedron
folding tube maps
signorini conditions
royal baby
approximation
triangles
tennis
raspberry pi
countdown
errors
news
crossnumbers
databet
football
royal institution
electromagnetic field
recursion
bots
dragon curves
golden spiral
probability
ternary
gerry anderson
zines
coins
mean
computational complexity
christmas
flexagons
ucl
fence posts
people maths
light
propositional calculus
24 hour maths
pascal's triangle
matrix of minors
hyperbolic surfaces
machine learning
simultaneous equations
php
london
javascript
a gamut of games
youtube
estimation
hats
manchester science festival
kings
platonic solids
mathsjam
edinburgh
binary
harriss spiral
big internet math-off
draughts
fonts
curvature
games
python
dataset
datasaurus dozen
interpolation
weather station
reddit
pac-man
exponential growth
final fantasy
dinosaurs
folding paper
guest posts
finite element method
matrix of cofactors
bubble bobble
go
manchester
finite group
video games
boundary element methods
inverse matrices
statistics
quadrilaterals
bodmas
radio 4
bempp
© Matthew Scroggs 2012–2025
on /blog/97