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.

2024-12-27

@Seth Cohen: Thanks Seth, I solved it by looking at the 5×5 picture and thinking harder. Thanks to Matthew for another enjoyable set of puzzles. I look forward to reading the proper solution.

Reza
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

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2025