Cut the papers into strips and have students take turns drawing them out of the envelope and answering the questions.
Keep the answer key separate. They will pass the answer key around the group members so the person answering is directly across from the person with the key.
If they get it right, they keep the question. If they get it wrong it goes back in the envelope.
If they draw a Kaboom, all of that students questions go back in the envelope. Whoever has the most when time is called, wins.