Question

Anmol finds that he is twelth from the right in a line of boys and fourth from left ,how many boys should be added to the line such that there are 35 boys in the line?

(1) 19
(2)31
(3)14
(4)20

Answer 1

4. 20

12+4-1 = 15
35-15 = 20

Answer 2

rank from right - 1 (because he was also standing) + rank from left 
12-1+4 = 15 

35 - 15 = 20 boys are rerequried