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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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The importance of estimation error
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Is MEDUSA the new BODMAS?
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Palindromic dates
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Tube map kaleidocycles
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Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
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Euro 2016 stickers
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Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
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Christmas (2015) is over
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▼ 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?
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How OEISbot works
MENACE
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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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Electromagnetic Field talk
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Countdown probability, pt. 2
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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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weak imposition
polynomials
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pi approximation day
wordle
arithmetic
hannah fry
tmip
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rhombicuboctahedron
accuracy
signorini conditions
harriss spiral
pythagoras
pokémon wordle
standard deviation
hexapawn
wool
stirling numbers
golden spiral
world cup
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correlation
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go
folding paper
final fantasy
light
gerry anderson
exponential growth
chess
errors
logs
a gamut of games
nine men's morris
nonograms
probability
golden ratio
matrix of cofactors
royal baby
reuleaux polygons
cambridge
programming
tetris
recursion
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triangles
noughts and crosses
javascript
approximation
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numerical analysis
misleading statistics
kenilworth
interpolation
matrices
determinants
weather station
bluesky
estimation
books
puzzles
dataset
sorting
european cup
partridge puzzle
game show probability
gaussian elimination
plastic ratio
folding tube maps
regular expressions
craft
thirteen
cross stitch
convergence
pascal's triangle
gather town
royal institution
numbers
zines
tennis
curvature
london underground
mean
propositional calculus
countdown
big internet math-off
sport
games
rugby
palindromes
speed
crochet
inline code
logic
warwick
wave scattering
matrix multiplication
pizza cutting
manchester
logo
python
mathsjam
turtles
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latex
realhats
matt parker
manchester science festival
oeis
radio 4
youtube
fonts
map projections
edinburgh
hats
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anscombe's quartet
mathsteroids
braiding
london
binary
people maths
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arrangement puzzles
24 hour maths
news
bempp
bubble bobble
martin gardner
newcastle
ucl
reddit
simultaneous equations
guest posts
crosswords
runge's phenomenon
crossnumbers
coventry
sound
fence posts
menace
the aperiodical
sobolev spaces
ternary
squares
platonic solids
mathslogicbot
captain scarlet
fractals
data
datasaurus dozen
kings
christmas
alphabets
inverse matrices
computational complexity
video games
dates
rust
live stream
trigonometry
data visualisation
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chalkdust magazine
draughts
matrix of minors
friendly squares
bodmas
hyperbolic surfaces
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