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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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PhD thesis, chapter ∞
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PhD thesis, chapter 1
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A bad Puzzle for Today
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A 20,000-to-1 baby?
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Origins of World War I
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Happy 10+cos(τ) Approximation Day!
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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
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
▼ 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
cambridge
pizza cutting
stickers
flexagons
binary
preconditioning
datasaurus dozen
dinosaurs
hexapawn
error bars
graphs
matrix multiplication
pi
misleading statistics
mathslogicbot
oeis
menace
simultaneous equations
finite group
curvature
chess
bubble bobble
inverse matrices
hyperbolic surfaces
electromagnetic field
gather town
runge's phenomenon
statistics
christmas card
coins
european cup
harriss spiral
pythagoras
probability
fence posts
estimation
speed
accuracy
matrices
hannah fry
cross stitch
manchester science festival
captain scarlet
php
machine learning
inline code
a gamut of games
anscombe's quartet
approximation
programming
folding tube maps
royal baby
chalkdust magazine
boundary element methods
databet
computational complexity
sound
martin gardner
ucl
draughts
christmas
gaussian elimination
advent calendar
numbers
the aperiodical
edinburgh
games
news
chebyshev
tmip
braiding
noughts and crosses
mean
world cup
data visualisation
propositional calculus
wool
recursion
final fantasy
polynomials
puzzles
convergence
mathsteroids
wave scattering
guest posts
sobolev spaces
geogebra
bots
countdown
royal institution
logs
javascript
books
24 hour maths
manchester
crossnumber
tennis
python
finite element method
video games
platonic solids
arithmetic
ternary
triangles
map projections
reddit
weather station
exponential growth
bempp
pascal's triangle
game show probability
geometry
friendly squares
hats
mathsjam
weak imposition
pi approximation day
numerical analysis
big internet math-off
game of life
graph theory
zines
errors
nine men's morris
sport
palindromes
interpolation
light
logic
bodmas
quadrilaterals
stirling numbers
golden spiral
correlation
reuleaux polygons
fractals
logo
sorting
national lottery
turtles
matrix of minors
raspberry pi
matt parker
gerry anderson
phd
kings
dataset
realhats
determinants
trigonometry
plastic ratio
frobel
data
dates
go
matrix of cofactors
london
newcastle
pac-man
youtube
live stream
rhombicuboctahedron
talking maths in public
football
rugby
radio 4
london underground
crochet
asteroids
standard deviation
fonts
squares
signorini conditions
latex
craft
regular expressions
people maths
dragon curves
folding paper
golden ratio
© Matthew Scroggs 2012–2025
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