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Directions for questions 1 to 4: The instructions given below is followed by a set of four questions. Choose the most appropriate answer to each question.
Answer the questions on the basis of the information given below.
Five persons – Ankit, Kishore, Praveen, Rajesh and Trived – had a certain number of books with them. The number of books with each of them was a distinct prime number less than 25, but the sum of the number of books with any two persons was a prime number. Further, the total number of books with the five of them was an even number. It is known that:
1. How many books does Ankit have?
2. What is the total number of books with the five of them?
3. For how many pairs of persons is the difference between the number of books with them a prime number?
4. How many books in total do Rajesh and Ankit have?