The Indisputable Santa Mathematical Advent Calendar
Day 18

Happy 18th 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’s puzzle has two levels of difficulty…

Fun:

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… and Fiendish:

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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:

Lyric 1: White Christmas, Rudolph the Red-Nosed Reindeer, Jingle Bells
Lyric 2: We Wish You a Merry Christmas, Santa Claus is Coming to Town, The Christmas Song*
Lyric 3: 
Little Drummer Boy, Let it Snow, Deck the Halls

Well done to and Olaf Doschke and Mr H, who both got 9/9, with a bronze medal for Junko Tsurusawa (via the comments), with a creditable 7/9.


* i.e. “Chestnuts roasting on an open fire…”

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Day 18

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