See Who Laughs!

This is a joke my father used to tell. I tell it to my classes and then watch their reaction. I can tell right away who gets it and who doesn't.

One day a man went into a pizza parlor and ordered a pizza.
The waiter asked him,"Would you like your pizza cut into six slices or eight slices?"
After thinking for a moment, the man replied,"Well, you'd better cut it into six slices; I could never never eat eight!"

This is a good time to point out that fractions that have the same numerator and denominator always equal 1 or 6/6 =8/8