What's the duration of McMahon's service as a government minister?
Over 21 years
Over 15 years
Over 30 years
Over 10 years
Answer
McMahon served in the federal government for over 21 years. He was first appointed to the ministry in 1956 and served in various portfolios until his retirement in 1977. He was the longest-serving minister in Australian history, and was also the longest-serving treasurer.
The McMahon Mastery: Testing Your Knowledge on Australia's 20th Prime Minister