IBPS Clerk Prelims Model Paper 15

As
7 × 1– 1 = 6
6 × 2 – 2 = 10
10 × 3 – 3 = 27
27 × 4 – 4 = 104
104 × 5 – 5 = 515
Similarly,
(a) ⇒ 9 ×1 – 1 = 8
(b) ⇒ 8 ×2 – 2 = 14
(c) 14 × 3 – 3 = 39
(d) 39 × 4 – 4 = 152