which prime ministers were over 50 years of age at the beginning of their terms?
edmund barton, george reid, joseph cook, billy hughes, james scullin, joseph lyons, earle page, john curtin, frank forde, ben chifley, harold holt, john gorton, gough whitlam, bob hawke, john howard, kevin rudd, tony abbott
of those, who started their term prior to 1930?
edmund barton, george reid, joseph cook, billy hughes, james scullin
how long did the very first prime minister serve?
996 days