Find the missing number?

Find the missing number?

Find the missing number?

Find the missing number?

Five people are sitting in a row facing north. C is fourth to the left of M and both have only one neighbour. B sits exactly in the middle of the row. N sits to the immediate left of M. V is another person. What is the position of N with respect to V?

Six boys are sitting around a circular table facing the centre. M is sitting second to the right of K who is sitting opposite to F. L and O are sitting opposite each other. Neither L nor R sits near F. Who sits in front of R?

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

Direction: What should come in place of the questions mark (?) in the following letter series?
reoc, pgme, nikg, Ikii, ?