Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Fifth Gymnasium (Croatian: V. gimnazija, Peta gimnazija) is a high school in Zagreb, Croatia specialising in mathematics. It opened its doors on 7 November 1938. Today it has about 800 students in 26 classes.It is known as one of the best schools in Zagreb, even in Croatia. It has a developed students' council and web team.In 2007 the school's team of programmers won first prize in the international TopCoder High School Championship at Purdue University, and one of its students, Ivo Sluganović, won second prize in the individual event.