I was wondering if percentiles should be made more accurate, such as 93.85 % vs 94 %. I'm sure that there are more than 100 people on Brilliant. :P Also, perhaps we could have a global rating system? A leaderboard of the top 10, or top 100 in a subject, would definitely motivate a lot of people. But there are the issues of people possibly cheating to make the leaderboard. Maybe this isn't as simple as I thought it would be.