Wedding math should be easy: You + Me = We, right? For Portlanders Jonathan Young and Lindsay Walton, the calculations were a bit tougher. As numbers people (he works in IT at Nike, she’s in accounting at the Veterans Affairs hospital) the couple wanted to reflect their love of math. They dreamed up a seating chart that required each guest to do a math problem with the result becoming the assigned table number. Jonathan created the equations, custom-tailoring some to be more difficult for guests he knew could accept the challenge. “Reactions were mixed,” recalls Jonathan.