As an honored wedding guest you're expected to dress nice and get yourself and your gift to the chapel on time. And in the case of this couple, get a good nights sleep and be sharp enough to solve a math equation. A bride and groom, both mathematicians, thought it would be a hoot to make all of their guests solve an equation to unlock their seating arrangements. The bride's facebook page was screenshot and posted to Reddit.
A gift AND a math question. Now you've gone too far. I'm out.