The ordering of questions is related to their difficulty level. The questions are categorized as follows: questions 1-20 correspond to the knowledge level, questions 20-30 correspond to the comprehension level, and questions 30-40 correspond to the application and high application level, with the latter typically focusing on questions 35-40. The quantities Max and Min provide us with the ability to assess the best and worst performance of LLMs on the VNHSGE dataset. For instance, for question "x", ChatGPT gave the correct answer while BingChat gave the wrong one, so Max is true (value "1") and Min is false (value "0"). As the order of the questions is linked to their difficulty, we can evaluate the accuracy of the answers based on the question order, enabling us to determine the LLMs' ability based on the level of question difficulty.