Both of us were assigned different groups of seven partners in the class. I was given seven slips of paper and my opponent was given six. Our goal was to make deals with our partners about how to divide a dollar, one per partner, and then write the deal down on a slip of paper.

It took me an unduly long time (five minutes, perhaps) to figure out that there were two main participants, who were in competition, with seven accessory participants each. Is it just me? (I wonder if this has anything to do with the unusually high amount of caffeine I had today.)