This joke may be a little dated, but it's still funny.
A business owner was looking to hire a manager and he interviewed each candidate with a simple question: “How much is 2 + 2?”
The engineer pulled out his slide rule and shuffled it back and forth, finally announcing: “ It lies between 3.98 and 4.02.”
The mathematician said “I can demonstrate it equals 4 with the following short proof”.
The psychologist said “It’s not for me to answer, but we should spend some time exploring the question”.
The attorney stated “In the case of Swenson v. the State, 2 + 2 was declared to be 4. “
The accountant looked at the business owner, got out of his chair, and closed the office door. Then he leaned across the desk and said in a low voice “How much would you like it to be? “
The accountant got the job.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan