You can try and do this legit, but you have to be very fast and accurate to get this score. Without using any sort of "cheat" my best was 19, but with the below method, I got 50 with time to spare.
As soon as the question shows up, press menu button on controller to pause the game. On the browser, pick the correct answer. Unpause and then pause again. Keep doing this. Clock will not move when the game is paused but you can still see the question, take as much time as you want and select the correct answer.