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In this paper the exam results of the subject “Applied Mathematics for Informatics” from the last 10 years have been analysed. The exam has two parts: written test and oral exam. The grades of the students of the subject Applied Mathematics for Informatics formerly Methods of Operation Research have been low for a long time. We want to know if this is due to the quality of the tests or due to reducing the number of hours of contact teaching or due to the mathematical character of the subject and to the unpopularity of such kind of subjects or some other factors, for instance. Based on the bad results, students have also initiated a change in the scoring system. This article builds on our paper at the conference ERIE 2013. The main goals of this paper are to find out if the grades have had the tendency to decline during the years and to evaluate the validity, reliability, difficulty, and discrimination power of the tests.