I had no idea what was meant by the description for this file, nor for the help. What is a "pair" number? Does this perhaps refer to prime pairs? The help refers to an "impair" number. Do you need to input a pair of numbers? Sorry, but its quite confusing. I'd call the help a bit impaired.
Once you edit the file, you find out that all this does is to test if a number is even or odd, i.e., it is testing the parity of an integer. Its pretty trivial to do, but it is functionality that is already on the file exchange.
