Who killed Riddler?
Who killed Riddler? After realizing that John had set him up, Riddler was shot by a poisoned dart from a drone operated by Tiffany. As he died, he mentioned how they had broken the Pact. This comment caused Batman to realize that John and his friends had been involved with Riddler and his actions.
What is the Superman IQ?
DC uses a intellect ranking system from 1–12 where 1 is non sentinent beings, 2 is below average, 3 is average, 4 is above average, 5 is genius, 6 is exceptional and so on and 12 is just insane. Superman has 6th level intellect putting him as exceptionally smart.