Question: how old are the members of the scooby gang?
Answer: According to the original series bible from 1969 by Scooby-Doo, Where are You! creators Joe Ruby and Ken Spears (who later left Hanna-Barbera to build their own Saturday morning empire), the kids are all supposed to be high school juniors: Fred and Shaggy are 17, Daphne is 16, and Velma is 15. Scooby, the dog, is 7.