title: Given a number series, finding the Check Digit Algorithm...?
body: <p>Suppose I have a series of index numbers that consists of a <a href="http://en.wikipedia.org/wiki/Check_digit" rel="nofollow noreferrer">check digit</a>. If I have a fair enough sample (Say 250 sample index numbers), do I have a way to extract the algorithm that has been used to generate the check digit?</p>
  
  <p>I think there should be a programmatic approach atleast to find a set of possible algorithms. </p>
  
  <p>UPDATE: The length of a index number is 8 Digits including the check digit.</p>