X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If the complete work was finished in 16 days, in how many days can Y alone finish that work?

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?