Prem can do a piece of work in 112 days. Ben can do this work in 90 days. Prem started the work alone. After how many days should Ben join him, so that the total work is finished in 56 days?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?