According to websites specializing in competitions in the country, such as Qconcursos.com, grancursosonline.com, upcomingconcursos.com, editalconcursosbrasil.com and strat- giaconcursos.com, matters related to logic are among the most charged in national public tenders. This is because logical reasoning helps the individual duo to develop his reasoning ability, making him capable, mainly, to solve practical day-to-day problems quickly and efficiently. Thinking in this, we have developed material that provides support for candidates in the facing the study of the contents pertinent to logical reasoning, as well as for math teachers who want to improve their classes. The aproach of this knowledge is done through the explanation of the content with the resolution of examples and questions from different competitions. We did a study starting with conceptual evolution of logic, going through a bibliographic research, from the survey of theoretical references in books and internet sites, as well as we present solutions to several competition exam questions considered important for approval in events that demand logical reasoning.