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…

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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


SOLUTION TO YESTERDAY’S PUZZLE

Click here for the puzzle.

Scroll down for the solution…

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Solution:

Some explanations of how one of the wise men knew that his hat was red:

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Admittedly, it’s debatable as to how wise they actually were if it took “a few minutes” for even one of them to come up with this line of reasoning, but there you are.

Well done to everyone who submitted a correct solution. Warm Winter wishes to you all!

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Day 15

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