Ask the presenter to go back a slide

“Sorry, could you go back a slide?” They’re the seven words no presenter wants to hear. It doesn’t matter where in the presentation you shout this out, it’ll immediately make you look like you’re paying closer attention than everyone else is because clearly, they missed the thing that you’re about to brilliantly point out. 

Don’t have anything to point out? Just say something like, “I’m not sure what these numbers mean,” and sit back. You’ve bought yourself almost an entire meeting of appearing smart.