1)physicist and mathematician are given a task:
to boil some water in a tea pot. They are both
given empty tea pot.
So they both fill it up with water and then
put it on a stove and boil it.
Now the problem becomes more complicated:
The tea pot filled with water is standing
on the stove. The task is the same.
PHYSICIST: turns on a fire and heats the water.
MATHEMATICIAN: Pours out the water and the
problem is reduced to the previous one.
2) (a little stupid)
The guy gets on a bus and starts threatenning
everybody: "I'll integrate you! I'll differentiate you!!!"
So everybody gets scared and runs away. Only one person
stays. The guy comes up to him and says:"Aren't you scared,
I'll integrate you, I'll differentiate you!!!"
And the other guy says; "No, I am not scared, I am e^x"