mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
In number 4 what are we to take the difference between? Do you mean the difference between the original number and its reverse? If so when you add the difference back to the reverse you simply get the original number, which is ambiguous. I am not sure what you are asking us to do here.
Dan Whitman
on /blog/37
               
@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   
@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
 2025 

Mar 2025

How to write a crossnumber

Jan 2025

Christmas (2024) is over
Friendly squares
 2024 
▼ show ▼
 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

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

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2025