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.

2020-12-04

First, thank you for this gift. This was just what I needed to get through my day.
Second, I feel that I did something wrong, I see the picture, but I'm struggling with the fact that I did not color 4 and 13 black. Did I do something wrong?

Tara
on /blog/87

×1

2020-12-04

@Tara: Yes, looks like you may have got an incorrect answer for one of the black puzzles

Matthew
on /blog/87

×1

×2

×1

×1

×1

Archive

Show me a random blog post

2025

Jan 2025

Christmas (2024) is over
Friendly squares

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2025