mscroggs.co.uk
mscroggs.co.uk

subscribe

Blog

Christmas card 2020

 2020-12-03 
In November, I spent some time designing this year's Chalkdust puzzle Christmas card.
The card looks boring at first glance, but contains 9 puzzles. By splitting the answers into two digit numbers, then colouring the regions labelled with each number (eg if an answer to a question in the red section is 201304, colour the regions labelled 20, 13 and 4 red), you will reveal a Christmas themed picture.
If you want to try the card yourself, you can download this pdf. Alternatively, you can find the puzzles below and type the answers in the boxes. The answers will be automatically be split into two digit numbers, and the regions will be coloured...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
×2      ×2      ×2      ×2      ×1
(Click on one of these icons to react to this blog post)

You might also enjoy...

Comments

Comments in green were written by me. Comments in blue were not written by me.
@JDev: lots of the card will still be brown once you're done, but you should see a nice picture. Perhaps one of your answers is wrong, making a mess of the picture?
Matthew
   ×1   ×1   ×1   ×1     Reply
I finished all of the puzzles but the picture is far from colored in. Am I missing something?

These puzzles have been a blast!
JDev
×1   ×1   ×1   ×1        Reply
Thanks a lot, Matthew. It was great fun!
Gert-Jan
×1                 Reply
@Tara: I initially made the same mistake. Maybe you didn't take into account that 6 is not one of the available digits in question 1?
Sean
×1   ×2              Reply
@Tara: Yes, looks like you may have got an incorrect answer for one of the black puzzles
Matthew
×1   ×2   ×1   ×1   ×1     Reply
 Add a Comment 


I will only use your email address to reply to your comment (if a reply is needed).

Allowed HTML tags: <br> <a> <small> <b> <i> <s> <sup> <sub> <u> <spoiler> <ul> <ol> <li> <logo>
To prove you are not a spam bot, please type "uncountable" in the box below (case sensitive):

Archive

Show me a random blog post
 2025 

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

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

Archive

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