Date: Sat, 7 Mar 1998 10:30:47 0700 (MST)
From: Julien Faucher
Dear Dr. Bogomolny:
In your beautiful Interactive math pages on the web, in section Arithmetic and Algebra, there is the Flipping pancakes puzzle. Have you seen this puzzle treatead anywhere in more detail? I am interested in the following question:

What is the minimum number of flips to put a stack of n pancakes
in order for any initial ordering of pancakes?
Best regards,
Piotr (Peter) Rudnicki