Find the wrong term in the series: 1, 3, 7, 15, 27, 63, 127

In the sequence 4727235974752479478471, how many '7's are there which are immediately preceded by '4' but NOT immediately followed by '2'?

What is the suffix (pratyay) in the Hindi word 'Aitihasik' (historical)?

Read the following passage: 'Hadoti is comprised of four districts of Rajasthan - namely Baran, Bundi, Jhalawar and Kota. It is said that Hadi Rani, a legendary character, was married to the Chundawat chieftain of Salumber. The chieftain loved her so much that he felt reluctant to go to the battlefield. Hadi Rani persuaded him to comply with his duty towards his motherland, but for her love he would not agree. Somehow he agreed. Before leaving the house, he sent a man to his beloved to ask for a memento. Out of sheer devotion, Rani Hadi cut her head off her neck and sent it to him.' Question: What was the memento that Hadi Rani sent?

Choose the correct arrangement of words to make a sentence: 'My/ lost / I/ book/ have'