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Comments in green were written by me. Comments in blue were not written by me.
2025-12-24
@
Chad
: What was your wrong answer for #15? I had that one wrong too at first, and it took a kind of sneaky "Oh of course!" insight for me to figure it out.
Seth Cohen
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/blog/120
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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
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A regular expression Christmas puzzle
Christmas card 2024
Nov 2024
Christmas (2024) is coming!
Feb 2024
Zines, pt. 2
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Christmas (2023) is over
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Christmas (2023) is coming!
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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 ▼
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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 -10+e√2+5√3 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
weather station
palindromes
pokémon
trigonometry
chebyshev
golden spiral
dataset
reddit
big internet math-off
london underground
cambridge
python
data
mathsteroids
game show probability
pi
gerry anderson
fractals
harriss spiral
dates
finite group
pascal's triangle
hats
binary
dinosaurs
hexapawn
royal institution
errors
geometry
logs
thirteen
christmas
christmas card
reuleaux polygons
royal baby
plastic ratio
sport
ternary
datasaurus dozen
golden ratio
crossnumber
determinants
manchester science festival
exponential growth
logo
electromagnetic field
light
oeis
pi approximation day
24 hour maths
ucl
the aperiodical
asteroids
folding tube maps
kings
final fantasy
youtube
rugby
quadrilaterals
sound
runge's phenomenon
bodmas
frobel
mathslogicbot
raspberry pi
platonic solids
world cup
gaussian elimination
rust
mathsjam
pokémon wordle
chess
hyperbolic surfaces
captain scarlet
sobolev spaces
newcastle
sorting
numbers
curvature
advent calendar
computational complexity
machine learning
partridge puzzle
friendly squares
national lottery
people maths
php
regular expressions
error bars
arrangement puzzles
matrix of cofactors
programming
realhats
misleading statistics
signorini conditions
convergence
games
tetris
manchester
fonts
arithmetic
braiding
databet
tmip
inline code
crossnumbers
crochet
probability
approximation
martin gardner
logic
tennis
rhombicuboctahedron
finite element method
bubble bobble
game of life
pac-man
numerical analysis
matrix multiplication
kenilworth
warwick
squares
live stream
chalkdust magazine
pizza cutting
talking maths in public
bluesky
anscombe's quartet
phd
graphs
triangles
london
video games
inverse matrices
noughts and crosses
football
gather town
correlation
craft
zines
stirling numbers
wool
standard deviation
coventry
go
a gamut of games
coins
radio 4
latex
turtles
polynomials
accuracy
guest posts
flexagons
matt parker
data visualisation
geogebra
statistics
boundary element methods
cross stitch
hannah fry
crosswords
propositional calculus
european cup
dragon curves
speed
alphabets
estimation
wordle
matrix of minors
interpolation
simultaneous equations
edinburgh
fence posts
weak imposition
books
puzzles
graph theory
countdown
news
stickers
wave scattering
nine men's morris
pythagoras
map projections
nonograms
recursion
preconditioning
bots
draughts
mean
bempp
javascript
menace
folding paper
matrices
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