Happy late pi day to you math lovers.
A mathematician, a physicist, and an engineer are all given identical
rubber balls and told to find the volume. They are given anything they
want to measure it, and have all the time they need.
The mathematician
pulls out a measuring tape and records the circumference. He then
divides by two times pi to get the radius, cubes that, multiplies by pi
again, and then multiplies by four-thirds and thereby calculates the
volume.
The physicist gets a bucket of water, places 1.00000 gallons of
water in the bucket, drops in the ball, and measures the displacement
to six significant figures.
And the engineer? He writes down the serial
number of the ball, and looks it up.
From: http://math-fail.com/2010/03/pi-day-jokes.html