Mark writes: > The correct answer is apparently 3. And I think she should be proud and happy to have gotten the "wrong" answer on this question :-) Even if there is some logic to the "right" answer, this looks to me like an utterly useless piece of knowledge. I have never heard any such terminology used by a Mathematician, and I recommend that she try very hard to immediately forget this useless concept. G. * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *