In his column "Is the Eye of the Needle that tiny", printed in this week's Reader Weekly and High Plains Reader, Ed Raymond quoted an answer to college chemistry test on whether Hell gives off heat or absorbs heat. The answer depends on your assumptions on Hell expanding faster or slower than the number of people going to Hell.
One interesting conclusion the student came to was that everyone is going to Hell eventually. Since some religions believe that all who do not subscribe to their religion will go to Hell and since no one belongs to all such religions, everyone will go to Hell.