If you want to better understand news coming out of the Islamic world—or if you’d like to better understand your Muslim friends living down the street—you’ll need to know some of the differences between Islam’s two main divisions, Sunni and Shiah. Test what you know, and probably learn some things in the process, at The Christian Science Monitor’s online quiz: “Sunni and Shiite Islam: Do You Know the Difference?” Hint: If you can correctly answer the first question—”Which Muslim sect is larger demographically?” you’ll be well on your way to a decent score.

[photo: “China,” by Steve Evans, used under a Creative Commons license]