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Comments in green were written by me. Comments in blue were not written by me.
2024-07-31
Incorrect answers are treated is correct.
Looking at the JavaScript code, I found that any value that is a key in the array "regions" is treated as correct for all puzzles.
Lars Nordenström
on
/blog/108
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A surprising fact about quadrilaterals
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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 bad Puzzle for Today
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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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Assorted christmaths
Pointless probability
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"Uncanny" royal coincidence
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Tube map Platonic solids, pt. 2
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Tube map Platonic solids
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Archive
Show me a random blog post
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2025
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How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
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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 ▼
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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 ▼
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Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
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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 4+e+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
sorting
matrix multiplication
pi
chalkdust magazine
tmip
pizza cutting
inline code
royal baby
final fantasy
folding paper
flexagons
national lottery
zines
plastic ratio
anscombe's quartet
folding tube maps
logo
geogebra
machine learning
interpolation
people maths
nine men's morris
live stream
pascal's triangle
tennis
chess
pac-man
boundary element methods
pythagoras
matrix of cofactors
fonts
accuracy
harriss spiral
fractals
computational complexity
crossnumbers
advent calendar
edinburgh
raspberry pi
numerical analysis
game of life
christmas card
cambridge
exponential growth
matrix of minors
simultaneous equations
mathsteroids
stickers
ternary
friendly squares
polynomials
cross stitch
runge's phenomenon
manchester science festival
logs
signorini conditions
menace
books
captain scarlet
mean
london underground
determinants
hannah fry
crosswords
big internet math-off
turtles
regular expressions
oeis
pi approximation day
wool
christmas
arithmetic
javascript
hexapawn
speed
golden ratio
royal institution
probability
reddit
braiding
python
weak imposition
radio 4
dinosaurs
misleading statistics
newcastle
martin gardner
bodmas
matt parker
propositional calculus
recursion
data visualisation
datasaurus dozen
squares
guest posts
gather town
triangles
hyperbolic surfaces
golden spiral
php
databet
geometry
quadrilaterals
graph theory
video games
programming
talking maths in public
fence posts
preconditioning
news
crochet
games
latex
sport
platonic solids
the aperiodical
reuleaux polygons
graphs
numbers
convergence
game show probability
a gamut of games
stirling numbers
error bars
curvature
approximation
finite element method
bubble bobble
statistics
finite group
london
palindromes
frobel
manchester
mathslogicbot
ucl
phd
world cup
sound
crossnumber
inverse matrices
rugby
realhats
go
puzzles
countdown
gerry anderson
draughts
dragon curves
bempp
correlation
trigonometry
kings
dataset
binary
estimation
standard deviation
coins
sobolev spaces
weather station
electromagnetic field
youtube
chebyshev
football
european cup
light
map projections
asteroids
dates
logic
gaussian elimination
data
mathsjam
bots
hats
errors
noughts and crosses
wave scattering
matrices
craft
24 hour maths
rhombicuboctahedron
© Matthew Scroggs 2012–2025
Looking at the JavaScript code, I found that any value that is a key in the array "regions" is treated as correct for all puzzles.
on /blog/108