Show me a random blog post


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


Show me a random blog post
▼ show ▼

Christmas (2015) is over

The deadline for entering the 2015 Advent calendar competition has now passed. You can see all the puzzles and their answers here.
Thank-you to everyone who took part in the competition! In total, 23 people submitted answers to the puzzles. Every one of these had correct answers to at least 18 of the puzzles. The winners are as follows:
1ScottAll correct at 5:00:18 GMT on Christmas Day
2Louis de MendoncaAll correct at 5:00:32 GMT on Christmas Day
3Alex BoltonAll correct at 5:00:34 GMT on Christmas Day
4Martin HarrisAll correct at 6:15 GMT on Christmas Day
5Linus HamiltonAll correct at 14:12 GMT on Christmas Day
6ZephiAll correct at 20:40 GMT on Christmas Day
7Daniel ChivertonAll but one (5 December) correct at 5:00:24 GMT on Christmas Day
8Jon PalinAll but one (12 December) correct at 5:00:34 GMT on Christmas Day
9Kathryn CoffinAll but one (5 December) correct at 6:28 GMT on Christmas Day
10Félix BretonAll but one (15 December) correct at 9:05 GMT on Christmas Day
I will be in touch will all the entrants in the next few days and I will post pictures of prizes here once they are on their way!
I have already started working on puzzles for next year's (in fact this year's) calendar, so make sure you're back here in December...

Similar posts

Christmas (2018) is over
Christmas card 2018
Christmas (2018) is coming!
Christmas (2017) is over


Comments in green were written by me. Comments in blue were not written by me.
@stephan: It looks like the code I wrote to check the solutions were unique contained errors. This might explain why first question was very difficult to solve with logic alone.
Are you sure have unique solutions. See e.g. which gives lots of solutions
 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 "x-axis" in the box below (case sensitive):
© Matthew Scroggs 2019