Indian Institute of Foreign Trade 2016 Solved Paper

(b) Middle number = (difference between numbers of left column)$\times$ (sum of number of right column)
(2 + 6) $\times$ (15 – 5) = 80
(7 + 6) $\times$ (9 – 4) = 65
So, answer will be (16 + 8) $\times$ (13 - 11) = 24 $\times$ 2 = 48.