Take a board with 64 squares on it. Put a grain of wheat on the first square--two on the second--four on the third. Keep doubling in this manner and you will find there isn't enough wheat in the world to fill the sixty-fourth square. It can be the same with compound interest.
A gem of short story in the form of correspondence between the leaders of two opposing Political Blocs whose escalation of hostilities is rapidly suppressed from a surprise third party.
Foraminifera 9-Hart Bailey's Beam is bored. He relieves that boredom by traveling back in time to sometime before the high radiation levels and after the invention of anesthesia-you know, in case of accidents. He's read of the Mafia in New York City of the 1950s. He think that might be a place to start. He finds five you men, all dressed in same color jacket, and asks directions to the recruiting office of the "dread Camorra." He assures them he has plenty of money in his carry-all...