वह छोटी से छोटी संख्या कौन-सी है, जिसमें से 7 घटाने पर प्राप्त संख्या 12, 16, 18 और 21 से पूर्णतः विभाजित हो जाती है?

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?