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.

2020-01-02

It's interesting that the three puzzles with the most incorrect attempts can all be looked up on OEIS.

Day 15 - https://oeis.org/A001055 - "number of ways of factoring n with all factors greater than 1"

Day 4 - https://oeis.org/A001045 - "number of ways to tile a 2 Ã— (n-1) rectangle with 1 Ã— 2 dominoes and 2 Ã— 2 squares"

Day 2 - https://oeis.org/A002623 - "number of nondegenerate triangles that can be made from rods of length 1,2,3,4,...,n"

Adam Abrams
on /blog/72

×1

Archive

Show me a random blog post

2024

Feb 2024

Jan 2024

Christmas (2023) is over

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

Tags

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

Archive

Show me a random blog post
▼ show ▼

© Matthew Scroggs 2012–2024