<P ID="edit" class=small>(Edited by bandido on 05-Oct-05 14:45. To remove gobbledygook.)</P>In each problem, you are given a series of 'squares' of numbers. The same mathematical operations are applied to each square in each problem, but each problem uses different operations. One of the numbers in the last square in each problem has been replaced with a ?. You must determine what number should be there instead.