Christmas Lunch

One of my favourite events of the season - Christmas Lunch at Allanton World Peace Sanctuary. All the people who volunteer here or help out in some way are invited for an afternoon of food and good cheer. The lunch is all made from produce grown in the walled garden and inbetween courses there were some devilishly difficult quizzes....
At what temperature are Celsius and Fahrenheit values the same? (It took a maths whizz to work that one out - I'll tell you the answer tomorrow if you can't do it for yourselves).
The most difficult bit was identifying pop songs...played backwards!
I was good at the nature questions, though :-)