In a row of boys, if A is 10th from left and B is 9th from the right and interchange their positions, A becomes 15th from the left. How many boys are there in the row?

Find the missing number at the Question mark(?).
5, 7, 11, ?, 35, 67

A total of 78 soldiers were standing in a row. Ram Singh was standing at the 25th position from the left. Kuldeep Singh was standing at the 20th position from the right. How many soldiers were standing between Ram Singh and Kuldeep Singh?

Five birds are sitting on a tree. The Pigeon is to the right of the Parrot. The Sparrow is above the Parrot. The Crow is next to the Pigeon. The Crane is below the Crow. Which bird is at the centre? 

Find out the alternative figure which contains figure (X) as its part.

380, 645, 557, 656, 762, 875, ?

Find the missing number in the given Figure.

All dogs are asses and all asses are bullocks, which of the following statement is correct.