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.

2016-12-20

@Dan Whitman: Find the difference between the original number and the reverse of the original. Call this difference \(a\). Next add \(a\) to the reverse of \(a\)...

Matthew
on /blog/37

×1

2016-12-20

@Matthew: Thank you for the prompt response! It makes sense now and perhaps I should have read a little closer!

Dan Whitman
on /blog/37

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

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2026