As from the game's latest update, we've launched Magic Answer, a powerUp that selects the right answer for you. It will allow you to answer those questions you don't know or aren't sure about.
You will have 3 Magic Answers when you start, and then you will be able to get them through different packs within the game's Shop. There, you can buy them individually (Magic Answer packs), or in different packs in which you will find several powerUps, including Magic Answer.
You can find this powerUp on the lower right corner of your screen while you are playing.