An engineer, a physicist, and an accountant were being interviewed for a position as chief executive officer of a large corporation.
The engineer was interviewed first, and was asked a long list of questions, ending with: "How much is two plus two?" The engineer excused himself, and made a series of measurements and calculations before returning to the boardroom and announcing, "Four."
The physicist was interviewed next, and was asked the same questions. Before answering the last question, he excused himself, made for the library, and did a great deal of research. After a consultation with the United States Bureau of Standards and many calculations, he also announced, "Four."
The accountant was interviewed last, and was asked the same questions. At the end of his interview, before answering the last question, he drew all the shades in the room, looked outside the door to see if anyone was there, checked the telephone for listening devices, and asked, "How much do you want it to be?"