Regional competitions have the option of choosing their tournament style, e.g. only double elimination, only round robin, or a combination of both. However, it is strongly recommended that both a round robin and a double elimination segment be included since the nationals will have both. Rules of the Game 9. A toss-up question, which may be answered by any member of either team that is playing, must be answered correctly in order for a team to be offered a bonus question. No team will have more than one opportunity to answer a toss-up question.
Questions are either multiple choice or short answer.
The only acceptable answer to a multiple choice question will be one of those read by the moderator. Before answering the questions, the team member must be verbally recognized by the moderator or scientific judge. If not recognized, it is treated as a non-answer and the moderator will not indicate whether the answer was right or wrong. The question is reread in its entirety to the opposing team which is then given the opportunity to answer both it, and if correct, the bonus question. On toss-up questions, no consultation among team members may occur.