India does not have a national language. The official languages used though are Hindi and English. There is 17 major languages used in the regions and 844 dialects.
India was one of the richest countries on earth until the British invasion in the early 17th century. India is still a very rich country though and the World Bank ranks India as the country with the tenth highest gross domestic product (GDP).
The most commonly used number system is the Hindu–Arabic numeral system which was invented in India and the Indian scientist Brahmagupta was the person who invented the digit zero.
Short about India
A country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country.
CIA The World Factbook