From The Writer's Almanac, http://writersalmanac.publicradio.org/ (it's not plagiarism if I give credit, right?):
Denmark, Kangaroo, Orange
by Kevin Griffith
Pick a number from one to ten. Okay, now multiply that number by nine. You will have a two-digit number. Add those two digits. Now subtract five from that number. Take that number and find its corresponding letter in the alphabet (1=A, 2=B, etc.). Now think of a country that begins with that letter. Now name an animal that begins with the last letter of the country. Finally, name a fruit that begins with the last letter of that animal.