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.

2021-12-23

The version of the card on this page doesn't check if your answers are correct, so it will colour in any number you enter as long as it has the right number of digits.

Matthew
on /blog/92

×1

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

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026