Mathematician: Pi is the ratio of the circumference of a circle to its diameter. Engineer: Pi is about 22/7. Physicist: Pi is 3.14159 plus or minus 0.000005 Computer Programmer: Pi is 3.141592653589 in double precision. Nutritionist: You one track math-minded fellows, Pie is a healthy and delicious dessert!
Mathematician: 3 is a prime, 5 is a prime, 7 is a prime, and by induction - every odd integer higher than 2 is a prime. Physicist: 3 is a prime, 5 is a prime, 7 is a prime, 9 is an experimental error, 11 is a prime,... Engineer: 3 is a prime, 5 is a prime, 7 is a prime, 9 is a prime, 11 is a prime,... Programmer: 3 is a prime, 5 is a prime, 7 is a prime, 7 is a prime, 7 is a prime,... Salesperson: 3 is a prime, 5 is a prime, 7 is a prime, 9 -- we'll do for you the best we can,... Computer Software Salesperson: 3 is prime, 5 is prime, 7 is prime, 9 will be prime in the next release,... Biologist: 3 is a prime, 5 is a prime, 7 is a prime, 9 -- results have not arrived yet,...