Category Archives: Puzzles

The Indisputable Santa Mathematical Advent Calendar
Day 23

Happy 23rd of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

We’re getting to the business end of this advent calendar now and the puzzling is getting serious. High stakes stuff today, as Santa needs help getting into that iconic costume…

Two levels of challenge…

Merry:

day_n

And Mayhem!

day_nb

(For the advanced puzzle, note that not every path starting and ending in A involves a complete circuit of the pole. For example, if Santa follows the path ABCDBA, he has not completed a circuit.)

Each time you enter a room, you MUST follow all of the instructions written there.

For extra credit, try to find Santa’s shortest possible path in each case. And for extra extra credit, prove that your path really is the shortest.

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes.

The answers for these two puzzles won’t be available until Boxing Day, so you have an extra couple of days to think about them.

And join us tomorrow for the final day of the Impossible Santa Mathematical Advent Calendar!

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The Indisputable Santa Mathematical Advent Calendar
Day 22

Happy 22nd of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

You may remember from Day 10 that Santa is not all that good with passwords and security. Well…

day_r

Here’s the letter in copyable form:

05-06-02-19 20-02-15-21-02. 17-13-06-02-20-06 04-16-22-13-05 26-16-22 03-19-10-15-08 14-06 02 ~**MESSAGE~CORRUPTED**~ 6765-10946-8-233-233-1-10946-8-5 55-3-987-6765-1-34-8-5-4181-987-610. 10946-34-1-610-144 121393-987-17711. 1-1-4181-1 (1-21-8-5 8)

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

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The Indisputable Santa Mathematical Advent Calendar
Day 21

Happy 21st of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

Today, we’re investigating a crime…

day_z

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR

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The Indisputable Santa Mathematical Advent Calendar
Day 20

Happy 20th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

OK, since the upcoming final four puzzles of the calendar may be a little tough, today, some light relief…

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Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR

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The Indisputable Santa Mathematical Advent Calendar
Day 19

Happy 19th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

c0dnmmowgaabrhw

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR

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The Indisputable Santa Mathematical Advent Calendar
Day 18

Happy 18th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

Today’s puzzle has two levels of difficulty…

Fun:

day_10

… and Fiendish:

day_10b

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR

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The Indisputable Santa Mathematical Advent Calendar
Day 17

Happy 17th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…
 day_s

The lyrics were created using the same Markov model used to generate the Queen’s tweets. How many of the nine Christmas songs can you identify?

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

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The Indisputable Santa Mathematical Advent Calendar
Day 16

Happy 16th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

Today, we’re drawing inspiration from the great Only Connect (sort of…):

day_5

To interpret the pictures, remember it’s a Christmas quiz…

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

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The Indisputable Santa Mathematical Advent Calendar
Day 15

Happy 15th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

Today, I’m afraid there’s bad news for your seasonal transport business…

day_o

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

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The Indisputable Santa Mathematical Advent Calendar
Day 14

Happy 14th of December!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I are tweeting out Christmathsy bits and pieces, one a day, advent calendar style. Assuming we don’t run out of ideas, that is…

2016_12_14

Answers via the comments or on Twitter. All correct answers will be rewarded with deep respect and warm Christmas wishes. Enjoy!

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR

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