Agriculture is the primary occupation in rural Bihar, with crops like rice, wheat, maize, and sugarcane being major agricultural products. The region has fertile Gangetic plains suitable for farming.

Aryabhata (476-550 CE), born in Pataliputra, Bihar, was a renowned mathematician and astronomer who made groundbreaking contributions to trigonometry, algebra, and accurately calculated the value of pi.

Bhagalpur is famous for its silk weaving industry and is known as the 'Land of Weavers.' The region has a long tradition of silk fabric production, particularly the 'Bhagalpur Silk' which is renowned nationally and internationally.

The Overland Silk Route passed through Bihar, connecting India with Central Asia and China. Pataliputra served as an important trading center on this route during the Mauryan and Gupta periods.

James Grant conducted the first systematic census and survey of Bihar during British rule, contributing significantly to the administrative organization of the region.

Sikandar Shahi coins belong to the Delhi Sultanate period, specifically from the reign of Sikandar Lodi. These coins have been discovered in Bihar and indicate the extent of sultanate control over the region.

Bihar occupies approximately 2.5% of India's total geographical area, with an area of about 94,163 square kilometers, making it one of the smaller states in terms of area.

The Arthashastra, written by Chanakya (also known as Kautilya), provides detailed information about the administration, economy, and military organization of the Mauryan Empire centered in Bihar.

The Nalanda District Museum is located in Nalanda district and houses important archaeological artifacts and sculptures related to the ancient Nalanda University and the region's Buddhist heritage.

Using compound growth formula: P = P₀(1 + r)ⁿ where P₀ = 103 million, r = 0.025, n = 5 years. P = 103 × (1.025)⁵ = 103 × 1.131 ≈ 116.5 million ≈ 116 million