Make them intercect within the zoom, make them not intercect within the zoom. A child should be able to state an answer and support it with a full explanation. Mentors have to work harder when questions lead to multiple answers. In a sense all of our problems are open-ended. Choosing problems for collaborative teams to elaborate.
Students can change number of wedges, color of wedges, and location of wedges.
Perhaps students can define their own functions using a spread sheet or data table. Perhaps use chores in a family instead of raffle. Lots of ideas without focusing on one best question. Holly They generated a lot of ideas without exactly seeing how to put it into a problem. Two bags of marbles, compare the probability between them.