When was the Prime Minister of Australia born who defeated Abbott in 14 September 2015?
Abbott Government:  Less than two years later on 14 September 2015, Malcolm Turnbull defeated Abbott in a leadership ballot, 54 votes to 44. Malcolm Turnbull: Malcolm Bligh Turnbull (born 24 October 1954) is the 29th and current Prime Minister of Australia.
24 October 1954