Wouter van Ooijen wrote: > No kidding? For me this was part of the exam of the school that preceded > university (VWO in my country, corresponds to your highschool?). I > *loved* this subject. Yeah, I remember that we did pretty much this same problem (with fewer items) in 7th or 8th grade. This is really basic math. ****************************************************************** Embed Inc, Littleton Massachusetts, (978) 742-9014. #1 PIC consultant in 2004 program year. http://www.embedinc.com/products -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist