Question

in a row of 30 children, M is 6th on the right of R, who is 12th from left. Find the position of M from the right of the row

Answer 1

R is 12th from the left.
M is 6th to the right of R. => M is 18th from the left. 
Total 30 children.
M's position from the left = (30 - 18) + 1
                                           = 13