4.Vipul ranked ninth from the top and thirty-eight from the bottom in a class. How many students are there in the class?
5.In a row, Rahul is 10th from the left and Bunty who is 9th from the right interchange their positions, Rahul becomes 15th from the left. How many boys are in the row?
6.Find the missing number?
7. In a queue, Ajay is fourteenth from the front and Rahul is seventeenth from the end, while Gaurav is in between Ajay and Rahul. If Ajay is ahead of Rahul and there are 48 persons in the queue, how many persons are there between Ajay and Gaurav?
8.If all the letters of word UNDERTAKING are rearranged in alphabetical order, which one will be in the middle after rearrangement?
9.If 2=5, 4=18, 6=39, then 10=?
10.If X is the brother of the son of Y’s son, how is X related to Y?