# A Nice Function Puzzle

A nice little function/word puzzle here. Had me infuriated for some time.

You can find a list of all 110 words that were submitted on Twitter, along with their A and B values at M Shah’s blog, here (you need to scroll down to Activity #3). Be careful of spoilers though, because the solution is given just after the list of words.

# How to fill Philbert – MINI-PUZZLE

Here’s a bonus puzzle inspired by a recent Christmas purchase.

I bought this jolly fellow in Covent Garden:

We named him Philbert, for some reason.

As you can see, Philbert has two cubes in his stomach (dice, basically), each of which has a digit on each face. By rearranging the dice, you can count the days until Christmas.

Puzzle 1 (EASY)

# More Christmas Maths!

OK, so I’ve come out of my long period of digital aestivation and returned to my blog and to various social media platforms.

Rather excitingly, a new version of Hannah and my Christmas maths book is out today! There’s a new chapter about cake, so that’s nice.

There’s also a US version this year, in which we spell things differently and provide extra info on bizarre British festive traditions (though how they get through the day without detonating a small explosive in a cardboard tube and fighting over a pack of mini-screwdrivers, I have no idea).

The UK Edition on Amazon.co.uk

The US Edition on Amazon.com

Here are the two new covers, side by side:

UK Version

US Version

# Happy Boxing Day from The Indisputable Santa Mathematical Advent Calendar!

## Happy Boxing Day!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I were tweeting out Christmathsy bits and pieces, one a day, advent calendar style.

A final post, to provide the solution to Friday’s puzzle.

# Merry Christmas from The Indisputable Santa Mathematical Advent Calendar!

## Merry Christmas!

Throughout the month, to accompany the release of our book on the Mathematics of ChristmasHannah Fry & I were tweeting out Christmathsy bits and pieces, one a day, advent calendar style.

Thanks for following the Indisputable Santa Mathematical Advent Calendar. Just a few loose ends to wrap up, with a solution to our Christmas Eve puzzle today, with the solution to Friday’s puzzle (Santa’s Dressing Room Disasters) to come tomorrow…

# The Indisputable Santa Mathematical Advent CalendarDay 24

Happy 24th 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…

And so, the final day of the Impossible Santa Mathematical Advent Calendar has arrived. Santa is about to set off, but there’s still time to take a quick register of the reindeer:

“Now, Dasher! Now, Dancer! Now, Prancer, and Vixen!
“On, Comet! On, Cupid! On, Donner and Blitzen!”*

But, wait a minute… Which one is which?