mscroggs.co.uk
mscroggs.co.uk

subscribe

Blog

Christmas card 2018

 2018-12-08 
Just like last year and the year before, TD and I spent some time in November this year designing a Chalkdust puzzle Christmas card.
The card looks boring at first glance, but contains 10 puzzles. By splitting the answers into pairs of digits, then drawing lines between the dots on the cover for each pair of digits (eg if an answer is 201304, draw a line from dot 20 to dot 13 and another line from dot 13 to dot 4), you will reveal a Christmas themed picture. Colouring the region of the card labelled R red or orange will make this picture even nicer.
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 pairs of digits, lines will be drawn between the pairs, and the red region will be coloured...
If you enjoy these puzzles, then you'll almost certainly enjoy this year's puzzle Advent calendar.
                        
(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.
Someone told me I would like this puzzle and they were right!
Blaine
×1                 Reply
@Carmel: It's not meant to check your answers. It only shows up red if the number you enter cannot be split into valid pairs (eg the number has an odd number of digits or one of the pairs of digits is greater than 20).
Matthew
                 Reply
The script for checking the answers doesn't work properly
Carmel
                 Reply
Thank you Shawn!
SueM
                 Reply
So satisfying!
Heather
×1                 Reply
Great puzzle problems! Hint on #9: try starting with an analogous problem using smaller numbers (e.g. 3a + 10b). This helped me to see what I had to do more generally.
Noah
   ×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 "n" then "u" then "m" then "b" then "e" then "r" in the box below (case sensitive):

Archive

Show me a random blog post
 2024 

Feb 2024

Zines, pt. 2

Jan 2024

Christmas (2023) is over
 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

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

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2024