This is to point out that the function given in the prompt is abstract and the opposite of abstraction is concrete, so we use concrete examples to verify it, similar to our assignment method just now. Generally speaking, the simpler the example given, the better. Many problems can be seen at a glance.

2. Deduction.

Given some conditions or some numerical values in the prompt conditions, it is easy for you to judge, so this kind of problem should be deduced. Deduction is actually some calculation problems, simple calculation problems. Then push back from the prompt condition and choose which result.

3. Assignment method.

If we give a numerical value, we can immediately judge whether we are doing this correctly. This value can be added to a given condition or to four selected answers. If we add it, we will find that it is inconsistent with the conditions we set or with the facts we know. For example, 2 is less than 1, which is an obvious mistake, so it is definitely correct to exclude these and the last three.

4. analogy.

Push forward from the last selected answer, deny which error was introduced, and change to another one. We made three mistakes, and the last one must be correct. The latter three methods have some similarities. Analogy is time-consuming and laborious, and generally we don't use it very much.

The above is the sharing of four answering methods about multiple-choice questions in mathematics for postgraduate entrance examination. I hope it will help everyone. If you want to know more, please pay attention to this platform!