About the Mexican Citizenship Exam
In order to submit an application for Mexican citizenship, you must first pass a test. This test has two components, although many people are exempt from one or both parts.
The first component is a multiple choice test about Mexican culture and history. The test consists of 10 questions, and you must receive a score of 8 out of 10 correct answers in order to be successful. You have 10 minutes to complete the culture and history exam. Applicants who are past 60 years of age are exempt from this component.
The second component tests your Spanish comprehension. You must read out loud a short text and answer multiple choice questions about it. You must also pick an image from a stack of cards, and describe with three complete and orthographically correct sentences what is depicted on the card you chose. There is ten minutes to complete the Spanish component also. Applicants from Latin America and Spain are exempt from the Spanish comprehension component of the exam.
In the past, there was an official list of 100 questions from SRE that could be asked on the exam. Applicants only had to study these questions, and they were good to go. In 2018 this was changed, and the exam is now much more challenging. Applicants are expected to have a very broad knowledge of Mexican history, geography, popular culture, and gastronomy. Even people who have resided in Mexico for many years may be woefully unprepared for the citizenship exam, and may be in for a surprise if they think they can pass it without many hours of careful study.
The SRE lists several sources in their bibliography which they recommend for applicants to study. This includes the primary source, which is a book called Nueva historia mínima de México. This is a very good introduction to Mexican history, but applicants are expected to know much more than just textbook history. In addition to knowing when the first birth certificates were issued or the names of Mayan and Aztec gods, they may ask you anything from the real name of Juanga, to which Pueblos Mágicos are in which states, to who won the gold medal in the Olympics in a given year.