Thread:HMcCoy/@comment-28838092-20140708164421/@comment-28838092-20140708192259

What you the answer to this trivia question be? I was thinking 5, but many people were talking about Da Vinci and other sun badges being black hole badges in Khan Academy's early age.

How many Black Hole Badges have been created on Khan Academy? ( Current and Retired ) A: 2 B: 3 C: 4 D: 5 E: 6 F: None of the Above