Number 6. Six republics (Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, and Macedonia) and two autonomous provinces (Vojvodina and Kosovo).
Number 5. Five nationalities (Slovenes, Croats, Serbs, Montenegrins, and Macedonians).
Number 4. Four languages (Serbian, Croatian, Slovenian, and Macedonian). The official language was Serbo-Croatian or Croatian-Serbian.
Number 3. Three religions (Catholic, Orthodox, and Muslim).
Number 2. Two letters are in use (Latin and Cyrillic).
Number 1. A president (Josip Broz Tito died 1980.