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Comments in green were written by me. Comments in blue were not written by me.
2021-01-03
Happy New Year, one and all!
I think your links point to last year’s calendar puzzles. As for how to solve the puzzle on 21 December,
- permutations of [1,...,n+1] having no substring [k,k+1] - is an option.
(anonymous)
on
/blog/88
2021-01-03
@
(anonymous)
: Thanks, links corrected
Matthew
on
/blog/88
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A bad Puzzle for Today
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Pointless probability
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"Uncanny" royal coincidence
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Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2021
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 ϕ+e-2 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
pascal's triangle
stirling numbers
signorini conditions
dragon curves
approximation
royal institution
mathsteroids
coins
graph theory
matrix multiplication
bempp
menace
inverse matrices
oeis
ternary
geogebra
speed
matt parker
data visualisation
squares
numbers
javascript
advent calendar
reuleaux polygons
manchester
news
computational complexity
braiding
electromagnetic field
final fantasy
hexapawn
weak imposition
simultaneous equations
accuracy
a gamut of games
flexagons
national lottery
recursion
wool
python
football
books
asteroids
graphs
statistics
royal baby
numerical analysis
propositional calculus
nine men's morris
the aperiodical
game of life
misleading statistics
puzzles
programming
video games
gaussian elimination
folding tube maps
european cup
trigonometry
frobel
guest posts
error bars
exponential growth
finite element method
polynomials
preconditioning
noughts and crosses
hats
pac-man
tennis
golden ratio
binary
convergence
countdown
ucl
talking maths in public
harriss spiral
twitter
christmas
stickers
draughts
craft
estimation
geometry
hannah fry
pi
wave scattering
palindromes
matrix of minors
radio 4
gerry anderson
light
matrix of cofactors
determinants
phd
data
weather station
logic
php
pythagoras
quadrilaterals
mathslogicbot
platonic solids
game show probability
chebyshev
rugby
fractals
cross stitch
reddit
map projections
machine learning
people maths
world cup
latex
chess
martin gardner
raspberry pi
inline code
sorting
london
sobolev spaces
probability
pizza cutting
pi approximation day
dataset
tmip
plastic ratio
dates
golden spiral
big internet math-off
arithmetic
games
mathsjam
bodmas
sound
folding paper
rhombicuboctahedron
logs
captain scarlet
sport
go
bubble bobble
curvature
cambridge
boundary element methods
interpolation
manchester science festival
london underground
chalkdust magazine
realhats
triangles
matrices
christmas card
© Matthew Scroggs 2012–2021

2021-01-03I think your links point to last year’s calendar puzzles. As for how to solve the puzzle on 21 December, - permutations of [1,...,n+1] having no substring [k,k+1] - is an option.

on /blog/88