1. What if the matrix is not decoded? Can we still solve the questions?
Ans. Yes, you can choose a random question number and solve it. But your chances of getting a high score will be limited. You cannot come back and solve the puzzle once you select the question number.
2. What is the most common strategy?
Ans. Let’s say after solving the puzzle, you see a question with high difficulty, which can potentially fetch you many points.
But suppose you find that many people have already solved this question, and only a few people have solved a relatively easier question. In this case, solving the easier question is probably more profitable, since the score of a participant also depends on the number of people who have previously solved the question. So the most common strategy is to decode the matrix and correlate it with the graph in order to get maximum number of points.