The Vishnupad Temple is an ancient Hindu temple located in Gaya. It is believed to be constructed over the footprint of Lord Vishnu and is an important pilgrimage site.

Vaishali is one of the oldest cities in Bihar and was the capital of the Licchavi republic. It is historically significant and mentioned in ancient texts.

Mahavira Jayanti celebrates the birth of Lord Mahavira, the 24th Tirthankara of Jainism. He preached non-violence and asceticism in ancient Bihar.

The Grand Trunk Road was built during the Mauryan Empire under Ashoka. It connected the empire and was later rebuilt during the Mughal period and further improved by the British.

Calculation: Monsoon rainfall = 60% of 1200 mm = 0.60 × 1200 = 720 mm. This represents the monsoon contribution to the total annual rainfall.

Land for wheat = 30% of 50 = 0.30 × 50 = 15 hectares. Remaining land = 50 - 15 = 35 hectares. This remaining land can be used for other crops.

Guru Gobind Singh, the 10th Sikh Guru, was born in Patna on December 22, 1666. The Patna Sahib Gurudwara commemorates his birthplace.

The Bengal Famine of 1770 was caused by a combination of poor harvests, drought, and the exploitative tax policies of the British East India Company. Bihar, as part of Bengal, suffered severe famine and loss of life.

Modern Patna is built on the site of ancient Pataliputra, the great city of the Mauryan Empire. Patna retains many historical sites from this ancient period.

Nalanda University, one of the world's oldest universities (5th to 12th century CE), is located in Nalanda district. It was a major center for Buddhist learning and attracted scholars from across Asia.