mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
@Melli: the second digit doesn't need to be even, only the final digit of the second column must be even (the column contains a three digit even number). I'm going to add a clarification to make this clearer.
Matthew
on /blog/58
               
@Matthew: Oooh ...
Melli
on /blog/58
               

Archive

Show me a random blog post
 2026 

May 2026

World Cup stickers 2026

Apr 2026

A new puzzle every day
Mixing Wordle with other games

Feb 2026

Christmas (2025) is over
 2025 

Dec 2025

Christmas card 2025

Nov 2025

Christmas (2025) is coming!

Sep 2025

The partridge puzzle

Aug 2025

TMiP 2025 puzzle hunt

Jun 2025

A nonogram alphabet

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares
 2024 

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 ▼
 2022 
▼ show ▼
 2021 
▼ show ▼
 2020 
▼ show ▼
 2019 
▼ show ▼
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

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

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2026