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

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

Archive

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