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.

2018-12-10

Great puzzle problems! Hint on #9: try starting with an analogous problem using smaller numbers (e.g. 3a + 10b). This helped me to see what I had to do more generally.

Noah
on /blog/59

×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

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026