Basic jokes about math
The jokes below try to grab certain ways of mathematical
thinking. No offense is intended, these differences in
mentality are probably necessary for people in different
professions to do their job properly.
Way of thinking
- Pour out the water
- How many legs does a sheep have?
- What color are the sheep in Scotland?
- The volume of a little red ball
- Every girl is blonde
- How do you define a mathematician?
-
Social position
- The student, the assistant and the professor
- Mathematics and Computer Science
- The King's Astronomer
Way of thinking
Pour out the water
How does a mathematician or a physicist prepare tea?
Both of them pour water into the pot, light the flame,
boil the water, infuse the leaves.
What is the difference in the solution, if the pot is
already filled with water?
The physicist lights the flame, boils the water,
infuses the leaves.
The mathematician pours the water out, thereby
reducing the problem to the previous, already solved one.
How many legs does a sheep have?
Two in front, two in the back, two on the left side, two on
the right. That is eight, but we counted each leg twice, so
the result is four.
What color are the sheep in Scotland?
A mathematician, a physicist and an engineer travel on a
train in Scotland. They catch a glimpse a sheep.
Sheep in Scotland are black, it seems - ventures
the engineer.
You can be sure only that there is a black sheep in
Scotland - answers the physicist.
No, we know only that there is a sheep in Scotland with
at least one black side - corrects the
mathematician.
The volume of a little red ball
A mathematician, a physicist and an engineer are asked to
measure the volume of a little red ball.
The mathematician measures the diameter and
calculates the volume.
The physicist drops the ball into a tank full of
water, and measures how much water poured out.
The engineer looks up the volume in the Catalog of
Little Red Balls.
Every girl is blonde
Proof.
It is sufficient to show that in every set of girls, any
two members have the same hair color. Indeed, apply
this to the set of all girls. Since there exists a blonde
girl, every girl is blonde.
We prove the italicized statement by induction on the
size of the set. If the size is one, the statement is
clearly true. Suppose that the statement holds for every n
element set of girls, and consider an n+1 element set:
S={Kate, Julie, Ann, Elisabeth,...}. If Kate is dropped from
S, then an n element set remains, and by the induction
assumption, every girl in this subset has the same hair
color, say X. Similarly, if Julie is dropped from S, then
in this subset the hair color is uniform. But Ann's hair is
of color X, and so the same holds for Kate. Therefore the
hair color is uniformly X in S, too.
How do you define a mathematician?
A person is a mathematician, if he is willing to think for
hours (and builds up a beautiful theory in the process) in
order to spare a few minutes of ugly calculations.
Social position
The student, the assistant and the professor
The student has to know everything.
The assistant has to know where the appropriate book is.
The professor has to know where the assistant is.
Mathematics and Computer Science
What is the difference between two persons, doing research
in the same area of combinatorics, if one works at a Math
Department, and the other one at a Computer Science
Department?
Answer: $50000 per year (in wages).
The King's Astronomer
- Who is this ragged man in my Court?
- He is the Royal Astronomer.
- What is the job of my Astronomer?
- He prepares the maps for Your Majesty's fleet.
- And how can such an important man be so shabby?
- Because he receives only five guineas from Your
Treasury per year.
- He deserves more. Let him receive 100 guineas.
- With all respect, I must call Your Majesty's attention
to the fact, that in that case, the position of Royal
Astronomer will never be filled by an astronomer.