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.

2018-12-08

@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

2018-12-08

@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

Jan 2024

Christmas (2023) is over

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026