want. It
is a
problem in
arithmetic.”
“What do
you mean
by a
problem in
arithmetic？”
asked the
man.
“Well，if
six apples
are worth
five
cents，then
five
apples are
worth four
cents，four
apples are
worth
three
cents，three
apples are
worth two
cents，two
apples are
worth one
cent and
one apple
is worth
nothing. I
only want
one
apple，and
if one
apple is
worth
nothing
then it is
not
necessary
for me to
pay you.”
Bill
picked out
a good
apple，began
to eat
