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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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Optimal Pac-Man
Tube map stellated rhombicuboctahedron
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oeis
reuleaux polygons
tmip
captain scarlet
tennis
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rust
numbers
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gaussian elimination
folding paper
wool
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arithmetic
fractals
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countdown
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sorting
matrices
london
numerical analysis
alphabets
sobolev spaces
mean
puzzles
machine learning
finite element method
map projections
programming
folding tube maps
plastic ratio
speed
a gamut of games
inline code
sound
national lottery
determinants
zines
hats
bempp
latex
bodmas
matrix of minors
propositional calculus
newcastle
regular expressions
ternary
edinburgh
phd
christmas card
mathsjam
matrix of cofactors
hexapawn
recursion
rhombicuboctahedron
bubble bobble
live stream
ucl
geogebra
london underground
geometry
graphs
errors
crossnumber
warwick
dragon curves
game show probability
sport
partridge puzzle
golden ratio
gerry anderson
dinosaurs
the aperiodical
royal institution
kings
squares
harriss spiral
weather station
pascal's triangle
menace
binary
hyperbolic surfaces
rugby
error bars
news
polynomials
mathsteroids
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light
martin gardner
data visualisation
simultaneous equations
turtles
big internet math-off
dataset
pi
logic
radio 4
bots
fonts
manchester
friendly squares
correlation
standard deviation
cross stitch
braiding
datasaurus dozen
games
finite group
pi approximation day
european cup
interpolation
logs
pizza cutting
crochet
hannah fry
frobel
boundary element methods
matrix multiplication
anscombe's quartet
trigonometry
matt parker
go
game of life
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24 hour maths
christmas
final fantasy
dates
misleading statistics
javascript
computational complexity
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runge's phenomenon
logo
curvature
chalkdust magazine
data
weak imposition
preconditioning
stickers
guest posts
thirteen
flexagons
football
quadrilaterals
graph theory
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chebyshev
databet
nine men's morris
asteroids
kenilworth
people maths
stirling numbers
estimation
coins
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craft
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