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


SOLUTION TO YESTERDAY’S PUZZLE

Click here for the puzzle.

Scroll down for the solution…

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Solution:

There he was:

ws_soln

Too many correct answers to mention this time round. Still the fact that you’ve found Santa and thus saved Christmas for many millions of children should be reward enough.

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Day 21

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