This book is mainly aimed at candidates for the Military Schools (S. S. Euplides, S.S.A.S., S. Ikaros, S. N. Dokimoi) and contains topics from the tests they are examined on.

The main source for collecting the material was my students, candidates for the Military Schools, who for years have conveyed to me the topics of the tests they were asked for. Also, certain magazines of countries, where admission to Universities and Polytechnics is done through the examination of tests.

The first part of the book includes the Matrix tests, which I gave some greater extent to, first because I found that candidates mainly have difficulty with them and second because this type of tests is almost non-existent in Greek literature. The second part includes language tests and reasoning tests. From there on, the chapters are separated according to the varieties in which only candidates of certain Military Schools are examined. In the last chapter, there are some readiness tests, which are required both in the productive Schools of the Armed Forces and in the Schools of Enomotarchs, S.S.A.N. etc. At the end of the book, there is an appendix with the correct answers.

In conclusion, this book is necessary, not because it provides the solutions to certain topics, but because it teaches the candidate to think correctly, exercises their judgment, and cultivates their intelligence.