If 8th of April falls on Mon day. what would be the 30th day of that month? 

20 : 30 : : ? : 72 

Six girls are standing in a circle facing the center. Bindu is at the left of Biji. Rekha is between Bindu and Mumtaz. Jessa is between Biji and Nirmala. Who at the left of Mumtaz?

Pointing to a man in a photograph a woman says. He is the father-in-law of the wife of only paternal grandson of my own father-in-law. How is woman related to man? 

Stethoscope: Heartbeat:: ? : Temperature 

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? 

Spider: Insect :: Crocodile : ? 

Find the next number in the given series.

3, 13, 31, ? , 91