Find the next number in the given series.

3, 13, 31, ? , 91

Spider: Insect :: Crocodile : ? 

Q walked 20 m towards west, took a left turn and walked 20 m. Then he took a right turn and walked 20 m and again took a right turn and walked 20 m. How far is Q now from the starting point? 

Direction: In the following question, select the related letters from the given alternatives.

Elephant : Howdah :: Horse : ? 

Sushant said, "This girl is the wife of the grandson of my mother." who is Sushant to the girl? 

A is 13th from top, B is 18th from bottom. When A and B change their position then A becomes 21th from top. What is the new position of B from bottom?

In a class of 26 students, 14 have cats, 10 have dogs and 5 have parrots. If 4 have dogs and cats, 1 has dog and parrot, 3 have parrots and cats and no one has all the three. How many have none?

If A = 1; AND = 19 then BAT =?