Satish is 9 ranks ahead of Ajay in the class of 39 students. If Ajay’s rank is 15th from the last, then what is Satish’s rank from the start?

16th

Given: Satish is 9 ranks ahead of Ajay in the class of 39 students. 

THE LOGIC FOLLOWED HERE IS;

=> Ajay’s rank is 15th from the last and Satish's rank is 9 ahead of Ajay.

So,

Satish's rank from the last = 15 + 9 = 24th

Therefore, Satish's rank from the start = 39 - 24 + 1 = 16

Thus, 16th is correct.