What does your number converge to?
This math trick will accept a number, sort the digits from high to low and also
low to high. It will then find the difference of these two numbers. The process
will continue until a number is found that repeats. Try it a couple of times
with 4 digit numbers and check the results. Its very interesting. Try it with 3
The following links were good as of Aug 30, 2003
More info on this procedure