Digital reasoning is a compulsory part of the exam, but it is relatively simple. In this relatively simple problem, most students think that polynomial series is difficult, that they have not accumulated enough mathematics to remember so many polynomials, or that the law is too complicated to be used flexibly. In fact, polynomial series has its particularity, and this kind of problem can be solved quickly by grasping the main points.

First of all, how to judge the question type, we already know that when the number gap is between 1-2 times, it is mostly arithmetic progression or sum series; When it is between 3 and 6 times, it is mostly a multiple series; When it is more than 6 times, it is a multi-power series or a product series. In addition to the digital gap, we can also find the characteristic number through digital accumulation and judge that it belongs to a multi-power series. Polynomial series is a difficult problem, which requires more accumulation and more problems. In the current review, we need to focus on remembering the square of 2 to 2 1, the cube of 2 to 1 1, and the 3 to 5 powers of 2 to 5, and the numbers around them. Only by remembering the various forms and deformations of these common numbers can we grasp the key points in the ever-changing provincial examination, do well in each question, and finally achieve excellent results in the examination.