M, N and O alone can complete a work in 30, 36 and 45 days respectively. All three of them started the work together, but after 4 days M left the work and N left the work 9 days before the work was completed. O completed the remaining work alone. In how many days was the total work completed?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?