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Comments in green were written by me. Comments in blue were not written by me.
2025-12-18
Question: For the Dec 15 puzzle, does a trivial solution in which the only odd factor is 1 count? Nothing in the text prohibits this currently, but want to make sure this was not just overlooked.
Dan Whitman
on
/blog/120
2025-12-18
@
Dan Whitman
: yes, they count
Matthew
on
/blog/120
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PhD thesis, chapter ∞
PhD thesis, chapter 5
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Gaussian elimination
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A non-converging LaTeX document
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Proving a conjecture
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A bad Puzzle for Today
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Building MENACEs for other games
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A 20,000-to-1 baby?
World Cup stickers 2018
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Origins of World War I
Christmas (2017) is over
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Christmas (2017) is coming!
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Big Ben Strikes Again
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The end of coins of constant width
Dragon curves II
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The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
▼ show ▼
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Dec 2016
Christmas (2016) is over
Video game surfaces
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Nov 2016
Christmas (2016) is coming!
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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 ▼
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Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
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Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
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2013
▼ show ▼
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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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logo
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menace
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live stream
dataset
probability
folding tube maps
chess
chebyshev
cambridge
christmas
runge's phenomenon
map projections
error bars
quadrilaterals
matrices
bodmas
draughts
estimation
python
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craft
matrix multiplication
arithmetic
gather town
game of life
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newcastle
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puzzles
talking maths in public
coins
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partridge puzzle
ucl
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friendly squares
signorini conditions
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hats
edinburgh
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weather station
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rust
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books
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nine men's morris
big internet math-off
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logic
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interpolation
fonts
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youtube
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pi
fractals
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cross stitch
sorting
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pizza cutting
logs
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php
reddit
pascal's triangle
stirling numbers
chalkdust magazine
matrix of minors
final fantasy
crossnumbers
zines
exponential growth
databet
plastic ratio
recursion
braiding
pokémon
phd
noughts and crosses
warwick
boundary element methods
palindromes
speed
wool
curvature
squares
royal baby
wave scattering
determinants
dates
golden spiral
anscombe's quartet
fence posts
sobolev spaces
ternary
game show probability
national lottery
programming
sound
standard deviation
light
datasaurus dozen
matrix of cofactors
hyperbolic surfaces
reuleaux polygons
mean
mathsteroids
people maths
mathslogicbot
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hexapawn
crossnumber
folding paper
matt parker
a gamut of games
kings
games
countdown
triangles
misleading statistics
24 hour maths
javascript
harriss spiral
finite group
tmip
manchester
inverse matrices
approximation
crosswords
bubble bobble
data
wordle
alphabets
preconditioning
bots
pac-man
oeis
news
captain scarlet
gerry anderson
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numbers
football
frobel
asteroids
errors
thirteen
rhombicuboctahedron
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binary
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