Of course there is no
missing dollar. Adding $27 and $2 to get $29 is an irrelevant
operation. They paid $27 - $2 went to the dishonest waiter, and
$25 went to the restaurant.

PROOF THAT n =
n + 1

The problem here is
that every positive number has two square roots - one positive and
one negative. The last step, if correct, would read :

and this is true. You
can check:

A LIMERICK

A
Limerick by Jon Saxton.

ARISTOTLE'S
WHEEL PARADOX

The
outer circle has one-to-one contact with the surface. The inner
circle does not have one-to-one contact with the dotted line. It
slides and turns at the same time.