This one was done Jeopardy-style with me giving the answers and the respondents supposed to come up with the questions.
1. The Hulk, Captain America and Captain Marvel.
What three characters had Rick Jones as a sidekick in the 1960s?
2. Captain Marvel and Wonder Woman.
The trick to this one is remembering that there was only one Captain Marvel during the Silver Age, and he was the "man of the Kree", not the Big Red Cheese. The question is, "What two superheroes of the Silver Age wore bracelets?
3. Superman, Thor and the Vision.
What three heroes could survive in outer space without a helmet or spacesuit?
4. Quicksilver, Johnny Quick and Dr Fate (among others).
What three heroes could fly? This was a significant difference between Quicksilver and the Flash, as Pietro discovered that by kicking his feet back and forth rapidly, he was capable of flight.
5. 25 trillion miles.
What is the distance from Earth to Rann?
Michael Sensei got #1 right. Lito S also answered #1. Jim Houston got #1, #2 and #5. Michael Rebain also picked up #5, as did Jim. Aaron Bias got #1 right. Blaze answered #1 and #5.
I'm tempted to congratulate myself for stumping you folks on #3 and #4, but looking back I think those two answers were a little too vague.