The problem, OP, is that Pinkie has a photographic memory, and so do the clones. The real Pinkie gave the clones a crash course on her life story, and knowing Pinkie's motor mouth she can teach them a LOT in a short amount of time. Add onto the fact that the clones learn more and more about Ponyville and Pinkie's life with each passing second, and the quiz would've been so long that the clones would start slipping out of town hall before Twilight can quiz all of them

Also want to include the fact that NONE of the cloned Pinkie Pies knew the names of Pinkie's friends.. the real Pinkie Pie had to teach them so I doubt they know anything else that has happened, or what their own history is for that matter.