Arun could save 10% of his income. But 1 year later, when his income increased by 20%, he could save only the same absolute amount as before. By what percentage has his expenditure increased?

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?