mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
Is there a word missing (positive?) from Q9? Surely any positive integer, n, can be written as the sum of the consecutive integers -(n-1),...,-1,0,1,...,n-1,n.
Alec
on /blog/121
               
@Alec: Yes, it should say positive integers
Matthew
on /blog/121
         ×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

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

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

Archive

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