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

2025

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2025