mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
Question: For the Dec 15 puzzle, does a trivial solution in which the only odd factor is 1 count? Nothing in the text prohibits this currently, but want to make sure this was not just overlooked.
Dan Whitman
on /blog/120
               
@Dan Whitman: yes, they count
Matthew
on /blog/120
               

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

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

Archive

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