mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
@Jose: There is a mistake in your answer: 243 (0100000) is the number of numbers between 10,000 and 100,000 that do not contain the digits 0, 1, 2, 3, 4, 5, or 6.
Matthew
on /blog/47
               

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

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

Archive

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