That is because he didn't do it right.
The third mathematician is supposed to request half of what 1 had, the fourth would have half of what 3 had and so on an so on.
As the number of people grows:
1+.5+.25+.125+0.0625+0.03125+...
This number will come out to a finite number IF the number of people ends.
However, since it does not the number will eventually come to a number to close to 2 so as to become indecipherable.
Which is why the bartender just pulled out 2.
EDIT:
Horribly sorry for the Necro, But while I am here...
speidel28 said:
tmujir955 said:
Girls = Time+ Money (girls require time and money)
Time = Money (famous saying)
Girls = Money^2 (substitution)
Money = root of all evil (saying)
therefore
Girls = (root of evil)^2
Girls = evil
Where's my cookie?
Wrong.
Money + Money =/= Money^2, it equals 2Money
Money * Money = Money^2
That being said, it was still a good joke.
That joke is suposed to be said out loud.
Being in a Reltionship is a lot of work
And as we know work is the product of time and money.
SO: Girls=Time*Money
And since TIME=MONEY
We know that Girls=Money*Money=Money^2
From there on he has it right.