Which Number Follows in The Circle?

This is I think the first puzzle from the kind of numeric pie puzzles that I’m featuring on this website so I’m really excited. While it’s a little bit different from the other brain teasers you could have found on this site, still the same or very similar principles apply as in a classic numeric puzzle. The pie shape may make it seem a little bit more complex but it’s really fun to dive into the math combinations that might solve this task. So what do you think hides behind the question mark this time, what do your brain’s algorithms have to say on this one? Let us know on our Facebook fan page.