Answer : 1. "1113 AD"
Explanation :

1. Ajmer city was founded by the 11th century Chauhan dynasty king Ajaydev in 1113 AD.

2. Ajmer city is situated on the slopes of Taragarh hill of Aravali mountain range. The city is a popular pilgrimage site for Hindus and Muslims. It is also a centre of culture and education.