The Indisputable Santa Mathematical Advent Calendar
Day 11

Happy 11th 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…

Puzzle time:

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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!

We’ll reveal the answer to Friday’s tough Elfnigma tomorrow, so there’s still time to have a go at that one too.

CLICK HERE TO SEE THE WHOLE CALENDAR SO FAR


SOLUTION TO YESTERDAY’S PUZZLE

Click here for the puzzle.

Scroll down for the solution…

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Solution:

Santa’s PIN is 2512. As more than one person observed, this makes you wonder how he can ever have forgotten it in the first place! Comment of the day:

Well done to everyone who submitted a correct solution – far too many to mention this time, I’m afraid. Warm congratulations to you all!

1 thought on “The Indisputable Santa Mathematical Advent Calendar
Day 11

  1. Matthew Smith

    You need [REDACTED] extra reindeer teams (in addition to Santa). Call them… [This was a correct answer. Redacted to avoid spoilers, but well done!]

    Reply

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