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.

Similar posts

Christmas card 2017
Christmas card 2016
TMiP 2019 treasure punt
Christmas (2018) is over

Comments

Comments in green were written by me. Comments in blue were not written by me.
 2018-12-17 
@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).
Reply
Matthew
 2018-12-16 
The script for checking the answers doesn't work properly
Reply
Carmel
 2018-12-14 
Thank you Shawn!
Reply
SueM
 2018-12-14 
So satisfying!
Reply
Heather
 2018-12-10 
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.
Reply
Noah
 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>
To prove you are not a spam bot, please type "y-axis" in the box below (case sensitive):

Archive

Show me a random blog post
 2019 

Sep 2019

A non-converging LaTeX document
TMiP 2019 treasure punt

Jul 2019

Big Internet Math-Off stickers 2019

Jun 2019

Proving a conjecture

Apr 2019

Harriss and other spirals

Mar 2019

realhats

Jan 2019

Christmas (2018) is over
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

polynomials london underground frobel flexagons mathsteroids inline code curvature cross stitch electromagnetic field pizza cutting video games manchester science festival error bars noughts and crosses braiding chebyshev dataset interpolation london game show probability logic realhats books sorting radio 4 the aperiodical geometry rhombicuboctahedron data draughts gerry anderson fractals countdown propositional calculus binary reddit big internet math-off trigonometry machine learning martin gardner christmas twitter php python dragon curves games a gamut of games accuracy latex light pythagoras sport golden spiral sound manchester rugby menace arithmetic final fantasy approximation hats misleading statistics news nine men's morris probability map projections football matt parker go wool european cup royal baby triangles world cup captain scarlet estimation graph theory oeis mathsjam statistics platonic solids plastic ratio craft golden ratio weather station ternary stickers programming folding tube maps folding paper chalkdust magazine people maths pac-man reuleaux polygons bubble bobble palindromes national lottery cambridge bodmas tennis dates talking maths in public puzzles hexapawn speed coins mathslogicbot tmip javascript raspberry pi christmas card harriss spiral game of life asteroids chess

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2019