For Trivia Games, a question will always have a correct answer that needs to be set when you're configuring your questions and answers. This lets Crowdpurr know the correct answer when processing the incoming answer selections from your crowd.
If you created a Multiple-Choice question, you simply choose which existing Multiple-Choice answer is the correct answer(s). If you created a Text-Answer or Numerical-Answer question, you must input a correct answer (or set of alternative correct answers).
Set the Correct Answer of a Multiple-Choice Question
To set the correct answer, simply click the answer's grayed out star button on the top left-hand corner of the answer. Upon clicking this, you'll see the star turn yellow and the blue Correct badge will appear over to the answer you selected.
Alternatively, you can set the correct answer by clicking on the answer option's Edit (pencil) button of an answer, then click the Set as Correct Answer (star) button. You'll notice the yellow star and blue Correct badge moves to the answer that you selected.
After editing the answer options of each of your Multiple-Choice questions, don't forget to set the correct answer!