Find the missing number from the given responses.
72        44        68
91         ?         86
43        66        37 

If the ink of one pan ends up writing 10 page, how many panes will be required to write 20 copies of 40 page?

Which venn diagram shows the relation between male, female and teacher?

Find the diagram that show right relation between CAR, WOOD and Mouse?

Pointing to a boy Veena said, "He is the son of only son of my grandfather". How is that boy related to veena? 

If in a certain language, PLAYER is coded as QNDCJX, then how SINGER will be coded in the same language? 

225 : 400 :: 625 : ?

The word 'cattle' is related to 'herd' in the same way as 'sportsman' refers to.