IBPS Clerk Prelims Model Paper 15

As
15 × 1 – 1 × 6 = 15 – 6 = 9
9 × 2 – 2 ×5 = 18 – 10 = 8
8 × 3 – 3 × 4 = 24 – 12 = 12
12 × 4 – 4 × 3 = 48 – 12 = 36
36 × 5 – 5 × 2 = 180 – 10 = 170
Similarly,
(a) ⇒ 19 × 1 – 1 × 6 = 19 – 6 = 13
(b) ⇒ 13 × 2 – 2 × 5 = 26 – 10 = 16