Question

In a row of boys facing the north, a is sixteenth from the left end and c is sixteenth from the right end .b, who is forth to the right of a is fifth to the lect pf c in the row how many boys are there in the row

Answer 1

Clearly, according to the given conditions, there are 15 boys to the left of A, as well as to the right of C. Also, B lies between A and C such that there are 3 boys between A and B; and 4 boys between B and C.
So, number of boys in the row = (15 + 1 + 3 + 1 + 4 + 1 + 15) = 40.