A can build a wall in 8 days while B can break it in 3 days. A worked alone for 4 days, and then B joined to work with A for another 2 days. In how many days will A alone build the remaining part of the wall?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?