जब दो वृत्त एक-दूसरे को बाहरी रूप से स्पर्श करते हैं, तो उन पर खींची जा सकने वाली उभयनिष्ठ स्पर्श रेखाओं (common tangents) की अधिकतम संख्या कितनी होती है?

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?