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Comments in green were written by me. Comments in blue were not written by me.
2025-12-17
Many thanks for your puzzle again this year - I suspect I have run into a similar contradiction to Bob. It may be an interpretation issue. When you say that the answer is not a factor, do you mean any factor or one particular factor?
Larry
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Log-scaled axes
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PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
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PhD thesis, chapter 1
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A bad Puzzle for Today
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World Cup stickers 2018
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Christmas (2017) is over
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The importance of estimation error
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Is MEDUSA the new BODMAS?
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Video game surfaces
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Christmas (2016) is coming!
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Logical contradictions
Palindromic dates
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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 ▼
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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
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Logic bot
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Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
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Countdown probability, pt. 2
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Mar 2014
New machine unfriendly £1 coin, pt. 2
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2013
▼ show ▼
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Dec 2013
Assorted christmaths
Pointless probability
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"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 gamut of games
arithmetic
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statistics
tetris
pi approximation day
graphs
golden ratio
quadrilaterals
go
dataset
tennis
crossnumber
talking maths in public
error bars
fence posts
people maths
wool
bots
edinburgh
matrix of minors
dragon curves
plastic ratio
pi
flexagons
bluesky
coventry
graph theory
standard deviation
cross stitch
latex
london underground
fractals
runge's phenomenon
hexapawn
light
youtube
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interpolation
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guest posts
tmip
signorini conditions
logic
preconditioning
logs
golden spiral
rust
rugby
folding paper
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datasaurus dozen
ucl
fonts
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big internet math-off
matrices
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numbers
probability
determinants
oeis
braiding
game show probability
machine learning
data visualisation
inline code
pythagoras
php
mean
royal baby
captain scarlet
finite element method
wave scattering
live stream
chebyshev
london
football
javascript
data
speed
bubble bobble
raspberry pi
reuleaux polygons
nonograms
recursion
world cup
regular expressions
realhats
frobel
errors
chess
mathsteroids
simultaneous equations
kings
boundary element methods
estimation
menace
sorting
bodmas
sobolev spaces
friendly squares
stirling numbers
map projections
geometry
pascal's triangle
chalkdust magazine
electromagnetic field
palindromes
exponential growth
coins
geogebra
phd
christmas card
christmas
arrangement puzzles
matt parker
crosswords
crossnumbers
curvature
squares
stickers
folding tube maps
thirteen
draughts
manchester science festival
approximation
the aperiodical
misleading statistics
wordle
partridge puzzle
pizza cutting
convergence
matrix multiplication
crochet
puzzles
newcastle
martin gardner
hannah fry
books
logo
dinosaurs
weak imposition
nine men's morris
anscombe's quartet
noughts and crosses
advent calendar
propositional calculus
numerical analysis
manchester
games
european cup
video games
game of life
turtles
mathsjam
craft
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pac-man
24 hour maths
gather town
matrix of cofactors
programming
rhombicuboctahedron
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hats
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databet
sound
binary
weather station
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gaussian elimination
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