The solutions to the imp and pixie puzzles are below.

# Tag Archives: Solution

# 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 Christmas, Hannah 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 Christmas, Hannah 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…

# Sequence Challenge – SOLVED!

After 19 days and 55 rule guesses, the sequence challenge was SOLVED on Saturday morning.

The not-so-fabulous mystery prize will be revealed tomorrow. The image is a clue to its identity.

**UPDATE:** The mystery prize is now revealed at the bottom of the solution page.

.

Continue reading

# Gridlock Unlocked

The solution to the Gridlock puzzle is now available:

The next puzzle will be the really hard one that I have been promising for ages. The Mad Hatter is back, and this time he’s wearing a stetson…

# No, the answer wasn’t obvious…

Stephen Morris has provided a very detailed response to this question, which I have copied to the end of the original post.

It turns out that my intuition was correct (the tiling is possible if and only if *r* is a rational number lying in the half open interval (0,1]), but the proof is not obvious. The maths involved seems to be rather lovely though, so Stephen’s comments are well worth a look.

# Solution: Match Point Mystery

# There Wolf!

The solution to the “Where Wolf?”

puzzle is now available:

**#5: Where Wolf?
**

*A truth-tellers and liars puzzle.*

**12/06/2015**

Published:Published:

**Difficulty:******Maths knowledge required:**None

# The solution to the algebra puzzle…

The solution to Puzzle #4 is now up. Either follow the links from the puzzle itself **HERE**, or, if you have seen the question already, click **HERE** to go straight to the solution.

As I mentioned previously, I think this is a good puzzle for mathematics learners at GCSE level or for those setting out on A-level courses, both for checking up on basic algebraic understanding and for illustrating some specific problem-solving skills. I have summarised the key learning points that I think the puzzle raises on the solution page.

# Solution to the Mad Hatter Puzzle

Thanks to everyone who engaged with the Mad Hatter puzzle. The solution is now available. There is a link at the bottom of the puzzle page:

**#3: Kidnapped by the Mad Hatter
**

*A coloured hat puzzle!*

**16/03/2015**

Published:Published:

**Difficulty:******Maths knowledge required:**None

And HERE is a direct link to the solution.