which asks that you give the number of places you wish the problem 1/n solved to. It then asks for n.
I don't remember the original reason for the program, but it did occur to me that middle school students could use it to investigate various denominators to locate repeating decimals. We have been studying rational numbers. So far I have only used it as an extra credit assignment to find denominators that repeat is sets of 1, 2, 3, 4, etc.
Is this a reasonable assignment? Could you think of other purposes for it?