Starting from the second set of data, the former set of data is 1 more than the former set of data, and the latter set of data is three times as much as the former set of data. The reason is that when answering such questions, the number of items to be tested is divided into three parts on average (this is also a rule, only three parts are scored on average, and the number of times to be tested is the least), so the following data should be gradually expanded by three times.