Today’s author is Bill Jelen, author of 24 books on Microsoft Office Excel. He is a regular guest on TechTV with Leo Laporte and the host of MrExcel.com , which includes more than 300,000 questions and answers about Excel. Jenny asks "Is there a quick way of adding every other cell ?, I have a column of about 250 cells, and I have to select them manually using Ctrl. Can you help ?" Jenny, this is a matter of using a little math to remember how to determine if a number is even or is odd...