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Comments in green were written by me. Comments in blue were not written by me.
2020-12-04
First, thank you for this gift. This was just what I needed to get through my day.
Second, I feel that I did something wrong, I see the picture, but I'm struggling with the fact that I did not color 4 and 13 black. Did I do something wrong?
Tara
on
/blog/87
×1
2020-12-04
@
Tara
: Yes, looks like you may have got an incorrect answer for one of the black puzzles
Matthew
on
/blog/87
×1
×2
×1
×1
×1
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Log-scaled axes
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PhD thesis, chapter ∞
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PhD thesis, chapter 1
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A non-converging LaTeX document
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Proving a conjecture
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Runge's Phenomenon
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A bad Puzzle for Today
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A 20,000-to-1 baby?
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The importance of estimation error
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Braiding, pt. 2
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Making names in Life
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Proving Pythagoras' theorem
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Optimal Pac-Man
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Electromagnetic Field talk
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Tennis maths
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Countdown probability, pt. 2
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New machine unfriendly £1 coin, pt. 2
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2013
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Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
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Tube map Platonic solids, pt. 2
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Tube map Platonic solids
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A new puzzle every day
Mixing Wordle with other games
Feb 2026
Christmas (2025) is over
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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
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Chalkdust issue 17
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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 ▼
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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
▼ show ▼
▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy -3+τ-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
rust
video games
pokémon wordle
matt parker
edinburgh
hannah fry
php
pi
geogebra
logic
weather station
squares
fractals
london
approximation
zines
rugby
wordle
curvature
mathslogicbot
chalkdust magazine
pi approximation day
computational complexity
runge's phenomenon
matrix multiplication
mathsteroids
determinants
trigonometry
manchester
javascript
nine men's morris
gaussian elimination
dataset
ternary
exponential growth
raspberry pi
fonts
pascal's triangle
friendly squares
frobel
logo
bluesky
triangles
inverse matrices
crosswords
draughts
weak imposition
signorini conditions
sorting
quadrilaterals
boundary element methods
menace
preconditioning
tennis
matrix of minors
anscombe's quartet
crossnumber
turtles
interpolation
error bars
wool
golden ratio
final fantasy
24 hour maths
stirling numbers
european cup
programming
royal institution
plastic ratio
london underground
martin gardner
mean
harriss spiral
numerical analysis
chebyshev
stickers
polynomials
bots
estimation
noughts and crosses
asteroids
data
newcastle
reuleaux polygons
radio 4
puzzles
recursion
cambridge
coins
go
graphs
youtube
advent calendar
christmas card
databet
regular expressions
phd
folding tube maps
palindromes
dates
manchester science festival
guest posts
big internet math-off
probability
fence posts
game show probability
pythagoras
electromagnetic field
light
matrices
gerry anderson
people maths
sound
numbers
nonograms
crochet
games
ucl
christmas
reddit
dragon curves
convergence
logs
pokémon
the aperiodical
standard deviation
game of life
speed
sobolev spaces
rhombicuboctahedron
arithmetic
hexapawn
machine learning
sport
kenilworth
cross stitch
captain scarlet
pac-man
chess
statistics
python
inline code
finite element method
correlation
folding paper
crossnumbers
craft
bempp
simultaneous equations
braiding
oeis
news
thirteen
accuracy
realhats
dinosaurs
bubble bobble
coventry
kings
tmip
talking maths in public
geometry
football
bodmas
partridge puzzle
books
mathsjam
wave scattering
golden spiral
latex
a gamut of games
errors
binary
propositional calculus
hats
finite group
datasaurus dozen
gather town
tetris
arrangement puzzles
data visualisation
matrix of cofactors
map projections
warwick
flexagons
live stream
world cup
royal baby
hyperbolic surfaces
countdown
pizza cutting
platonic solids
national lottery
misleading statistics
alphabets
graph theory
© Matthew Scroggs 2012–2026
Second, I feel that I did something wrong, I see the picture, but I'm struggling with the fact that I did not color 4 and 13 black. Did I do something wrong?
on /blog/87