# Number Series Questions for SBI Clerk, Railway Group D and IDBI Executive 2018 set-6

0
98

Direction (Q.1-5): What will come in place of the question mark (?) in the following number series?

Q.1 18, 8, 6, 8, ?, 176

(A) 36

(B) 50

(C) 24

(D) 64

(E) None of these

Q.2 594, ?, 374, 286, 210, 144

(A) 495

(B) 476

(C) 425

(D) 465

(E) 415

Q.3 212.625, 141.75, 94.5, 63, ?, 28

(A) 42

(B) 50

(C) 26

(D) 32

(E) None of these

Q.4 51, 53, 63, 89, 139, ?

(A) 240

(B) 275

(C) 296

(D) 265

(E) None of these

Q.5 22, 15, 29, 8, 36, ?

(A) 54

(B) 10

(C) 1

(D) 5

(E) 25

Explanation:

 Pattern Series 18 18 18 × 0.50 – 1 8 8 × 1 – 2 6 6 × 2 – 4 8 8 × 4 – 8 24 (✓) 24 × 8 – 16 176

Explanation:

 Series : 594 476 374 286 210 144 Pattern : -118 -102 -88 -21 -7 +16 +14 +12 +10

Explanation:

 Pattern Series 212.625 212.625 212.625 ÷ 1.5 141.75 141.75 ÷ 1.5 94.5 94.5 ÷ 1.5 63 63 ÷ 1.5 42 (✓) 42 ÷ 1.5 28

Answer 4. (E) None of these

Explanation:

 Pattern Series 51 51 51 + (12 + 1) 53 53 + (32 + 1) 63 63 + (52 + 1) 89 89 + (72 + 1) 139 139 + (92 + 1) 221 (✓)