In a cultured, well-rounded tone, I tell them "It is dear (insert sir/lady here) the first 6 digits of the number pi". In every case, the response had been a resounding "Huh".
I have now documented in my little book 20 consecutive "Huh"s in a 2 day period, all at the same Tech Center.
I suspect that I would get the same response as to the question "What is the color of the green ground wire on an electrical circuit".
The hard one is: "What is the most importtant part of an electrical motor?"
(Mouse over below for the answer).