mscroggs.co.uk

mscroggs.co.uk

blog puzzles academic talks contact subscribe ↓ ☰ ↓

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.

2024-12-23

For Day 23: "so that every 9×9 block of squares in the grid contains" perhaps should read "so that every 3×3 block of 9 squares in the grid contains"

Dr. Matrix
on /blog/111

×1

2024-12-23

@Dr. Matrix: Thanks, I've corrected it

Matthew
on /blog/111

Archive

Show me a random blog post

2025

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

propositional calculus turtles bubble bobble youtube raspberry pi stickers advent calendar weak imposition manchester science festival finite element method geometry binary go bempp sport latex plastic ratio braiding runge's phenomenon newcastle london stirling numbers platonic solids misleading statistics ternary manchester people maths cambridge preconditioning noughts and crosses php puzzles convergence curvature inverse matrices crosswords matt parker bots reuleaux polygons wool gaussian elimination dataset game of life hyperbolic surfaces mathslogicbot crossnumber boundary element methods data visualisation numerical analysis databet finite group hexapawn weather station pascal's triangle christmas computational complexity squares zines craft hannah fry wave scattering video games world cup triangles games programming determinants nine men's morris matrix of cofactors probability quadrilaterals chalkdust magazine logo gather town rhombicuboctahedron map projections ucl trigonometry correlation palindromes countdown royal baby mathsjam crochet london underground signorini conditions game show probability christmas card flexagons radio 4 a gamut of games pythagoras data gerry anderson asteroids mathsteroids football phd talking maths in public numbers exponential growth dragon curves chebyshev speed regular expressions matrix multiplication approximation oeis 24 hour maths fence posts fractals books geogebra graphs fonts harriss spiral datasaurus dozen live stream big internet math-off national lottery estimation pac-man inline code reddit bodmas pi approximation day coins logic arithmetic european cup final fantasy menace errors matrix of minors logs standard deviation edinburgh sorting simultaneous equations martin gardner python chess sobolev spaces folding tube maps interpolation polynomials golden spiral golden ratio frobel graph theory anscombe's quartet statistics guest posts pizza cutting crossnumbers accuracy royal institution sound hats dinosaurs news rugby captain scarlet machine learning electromagnetic field dates friendly squares folding paper the aperiodical recursion pi draughts matrices tennis error bars cross stitch javascript realhats light mean tmip kings

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2025