CM Chandrababu Emotional Words About Manmohan Singh, Former PM Manmohan Singh Passes Away. Former Indian Prime Minister Manmohan Singh passed away at the age of 92. Singh, who served as Prime Minister from 2004 to 2014, was the architect of India's economic reforms. He made significant contributions, including the Mahatma Gandhi National Rural Employment Guarantee Act, the Right to Information Act, and the National Food Security Act. A distinguished economist, Singh's legacy includes his role as Finance Minister and receiving the Padma Vibhushan in 1987. For All Political and Latest News Updates Subscribe to Mango News.