A Mathematician, a Biologist and a Physicist are sitting in a street cafe
watching people going in and coming out of the house on the other side of
the street.
First they see two people going into the house. Time passes. After a while
they notice three persons coming out of the house.
The Physicist: "The measurement wasn't accurate.".
The Biologists conclusion: "They have reproduced".
The Mathematician: "If now exactly 1 person enters the house then it will
be empty again."
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A mathematician is asked to design a table. He first designs a table with
no legs. Then he designs a table with infinitely many legs. The rest of
the cases are of course trivial.
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An engineer, a physicist, and a mathematician are shown a pasture with a
herd of sheep, and told to put them inside the smallest possible amount of
fence. The engineer is first. He herds the sheep into a circle and then
puts the fence around them, declaring, "A circle will use the least fence
for a given area, so this is the best solution." The physicist is next.
She creates a circular fence of infinite radius around the sheep, and then
draws the fence tight around the herd, declaring, "This will give the
smallest circular fence around the herd." The mathematician is last.
After giving the problem a little thought, he puts a small fence around
himself and then declares, "I define myself to be on the outside and the
sheeps to be on the inside!"
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An chemist, a physicist, and a mathematician are stranded on an iland when
a can of food rools ashore. The chemist and the physicist comes up with
many ingenious ways to open the can. Then suddenly the mathematician gets
a bright idea: "Assume we have a can opener ..."
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A graduate with a Science degree asks, "Why does it work?"
The graduate with an Engineering degree asks, "How does it work?"
The graduate with an Accounting degree asks, "How much will it cost?"
The graduate with a Liberal Arts degree asks, "Do you want fries with
that?"