mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Comment
Comments
Comments in green were written by me. Comments in blue were not written by me.
2015-12-09
"9 December
You start at A and are allowed to move either to the right or upwards.
How many different routes are there to get from A to B?"
is there supposed to be some picture going with this question?
Mike D
on
/blog/23
2015-12-14
@
Mike D
: There was a picture missing. It has now been corrected.
Matthew
on
/blog/23
Archive
Show me a random blog post
2025
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
▼ show ▼
▲ hide ▲
Dec 2024
A regular expression Christmas puzzle
Christmas card 2024
Nov 2024
Christmas (2024) is coming!
Feb 2024
Zines, pt. 2
Jan 2024
Christmas (2023) is over
2023
▼ show ▼
▲ hide ▲
Dec 2023
Christmas card 2023
Nov 2023
Christmas (2023) is coming!
Zines
Sep 2023
TMiP 2023 puzzle hunt
May 2023
Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
▼ show ▼
▲ hide ▲
Dec 2022
Off-by-one errors
Christmas card 2022
Nov 2022
Christmas (2022) is coming!
Oct 2022
24 Hour Maths Game Show
Mar 2022
Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
▼ show ▼
▲ hide ▲
Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
Sep 2021
TMiP 2021 puzzle hunt
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 -4+g-φ 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
crochet
go
pizza cutting
books
game show probability
tennis
folding paper
craft
standard deviation
wave scattering
signorini conditions
computational complexity
palindromes
royal baby
regular expressions
mathsjam
pac-man
statistics
map projections
databet
draughts
realhats
video games
logs
machine learning
advent calendar
errors
javascript
weather station
radio 4
mean
speed
dinosaurs
data
trigonometry
a gamut of games
fractals
news
finite group
simultaneous equations
golden spiral
phd
noughts and crosses
gather town
chalkdust magazine
reuleaux polygons
matt parker
php
hexapawn
curvature
binary
people maths
dataset
mathsteroids
probability
dates
light
national lottery
inverse matrices
football
latex
european cup
error bars
numbers
turtles
coins
propositional calculus
london underground
anscombe's quartet
pi approximation day
arithmetic
finite element method
friendly squares
royal institution
python
christmas
misleading statistics
golden ratio
menace
numerical analysis
pythagoras
fence posts
gerry anderson
geogebra
games
crosswords
crossnumbers
stickers
live stream
accuracy
bots
quadrilaterals
cross stitch
martin gardner
rhombicuboctahedron
bodmas
convergence
stirling numbers
sobolev spaces
geometry
kings
matrix of minors
tmip
final fantasy
fonts
weak imposition
sorting
determinants
estimation
nine men's morris
rugby
dragon curves
platonic solids
newcastle
edinburgh
mathslogicbot
gaussian elimination
christmas card
sound
interpolation
graphs
matrix multiplication
raspberry pi
polynomials
manchester science festival
ternary
inline code
bempp
youtube
ucl
zines
the aperiodical
plastic ratio
boundary element methods
sport
captain scarlet
matrix of cofactors
hats
triangles
braiding
hannah fry
puzzles
london
countdown
pi
cambridge
oeis
24 hour maths
folding tube maps
manchester
reddit
graph theory
frobel
harriss spiral
chess
pascal's triangle
matrices
asteroids
logic
bubble bobble
electromagnetic field
wool
runge's phenomenon
datasaurus dozen
recursion
preconditioning
talking maths in public
flexagons
chebyshev
hyperbolic surfaces
squares
data visualisation
guest posts
game of life
correlation
exponential growth
crossnumber
logo
programming
big internet math-off
approximation
world cup
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2025
Mar 2025
How to write a crossnumber
Jan 2025
Christmas (2024) is over
Friendly squares
2024
▼ show ▼
▲ hide ▲
Dec 2024
A regular expression Christmas puzzle
Christmas card 2024
Nov 2024
Christmas (2024) is coming!
Feb 2024
Zines, pt. 2
Jan 2024
Christmas (2023) is over
2023
▼ show ▼
▲ hide ▲
Dec 2023
Christmas card 2023
Nov 2023
Christmas (2023) is coming!
Zines
Sep 2023
TMiP 2023 puzzle hunt
May 2023
Chalkdust issue 17
Apr 2023
Logo Asteroids
Mar 2023
Mathsteroids on hyperbolic surfaces
Feb 2023
The databet
Jan 2023
Christmas (2022) is over
2022
▼ show ▼
▲ hide ▲
Dec 2022
Off-by-one errors
Christmas card 2022
Nov 2022
Christmas (2022) is coming!
Oct 2022
24 Hour Maths Game Show
Mar 2022
Approximating π
Feb 2022
Build your own MENACE
Jan 2022
Christmas (2021) is over
2021
▼ show ▼
▲ hide ▲
Dec 2021
Christmas card 2021
Nov 2021
Christmas (2021) is coming!
Sep 2021
TMiP 2021 puzzle hunt
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 -4+g-φ 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
preconditioning
probability
inverse matrices
recursion
javascript
newcastle
propositional calculus
pascal's triangle
crossnumber
datasaurus dozen
craft
mathslogicbot
matrix multiplication
logo
crossnumbers
rugby
errors
quadrilaterals
sport
stirling numbers
oeis
game show probability
rhombicuboctahedron
regular expressions
polynomials
london underground
advent calendar
pythagoras
arithmetic
approximation
numerical analysis
sobolev spaces
cross stitch
european cup
national lottery
triangles
pizza cutting
machine learning
people maths
runge's phenomenon
python
map projections
game of life
logic
anscombe's quartet
hexapawn
youtube
frobel
news
inline code
speed
bubble bobble
video games
countdown
fonts
light
trigonometry
numbers
hannah fry
pi approximation day
php
nine men's morris
menace
hats
logs
curvature
manchester science festival
interpolation
24 hour maths
a gamut of games
draughts
bodmas
standard deviation
mathsjam
chess
zines
tennis
chalkdust magazine
folding paper
finite element method
gaussian elimination
matrix of minors
graph theory
dinosaurs
books
misleading statistics
final fantasy
fractals
estimation
christmas
fence posts
sorting
reuleaux polygons
hyperbolic surfaces
databet
wave scattering
matt parker
ucl
kings
phd
convergence
matrix of cofactors
coins
data visualisation
folding tube maps
determinants
programming
statistics
royal baby
correlation
geogebra
signorini conditions
mean
the aperiodical
electromagnetic field
royal institution
squares
football
flexagons
world cup
gather town
harriss spiral
asteroids
pi
stickers
matrices
noughts and crosses
london
bots
accuracy
ternary
manchester
captain scarlet
finite group
pac-man
crochet
latex
golden ratio
big internet math-off
puzzles
boundary element methods
crosswords
guest posts
dataset
radio 4
gerry anderson
weather station
live stream
dragon curves
sound
cambridge
palindromes
simultaneous equations
mathsteroids
tmip
friendly squares
talking maths in public
go
chebyshev
plastic ratio
dates
reddit
braiding
games
christmas card
turtles
data
bempp
wool
realhats
platonic solids
raspberry pi
binary
golden spiral
weak imposition
exponential growth
martin gardner
graphs
geometry
computational complexity
error bars
edinburgh
© Matthew Scroggs 2012–2025
You start at A and are allowed to move either to the right or upwards.
How many different routes are there to get from A to B?"
is there supposed to be some picture going with this question?
on /blog/23