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.

2016-01-16

Are you sure http://www.mscroggs.co.uk/puzzles/126 have unique solutions. See e.g. http://cryptarithms.awardspace.us/solv... which gives lots of solutions

stephan
on /blog/24

2016-07-14

@stephan: It looks like the code I wrote to check the solutions were unique contained errors. This might explain why first question was very difficult to solve with logic alone.

Matthew
on /blog/24

×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

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026