Number Series Questions for SBI Clerk, Railway Group D and Karnataka bank PO 2018 set-5

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

Q.1 141, 147, 171, 231, ?, 561

(A) 316

(B) 350

(C) 325

(D) 368

(E) 351

 

Q.2 46775, ?, 4725, 675, 135, 45

(A) 51026

(B) 41259

(C) 42525

(D) 49625

(E) None of these

 

Q.3 128, 64, 32, 24, ?, 30

(A) 24

(B) 30

(C) 16

(D) 28

(E) None of these

 

Q.4 1219, 652, 463, 400, ?, 372

(A) 340

(B) 375

(C) 396

(D) 350

(E) None of these

 

Q.5 77, 24, 67, 34, 53, ?, 35, 66

(A) 30

(B) 36

(C) 48

(D) 55

(E) None of these

 

Answer 1. (E) 351

Explanation:

Pattern Series
141 141
141 + (23 − 2) 147
147 + (33 − 3) 171
171 + (43 − 4) 231
231 + (53 − 5)   351 (✓)
351 + (63 − 6) 561

Answer 2. (C) 42525

Explanation:

Series Pattern
467775 467775
467775 ÷ 11   42525 (✓)
42525 ÷ 9 4725
4725 ÷ 7 675
675 ÷ 5   135
135 ÷ 3 45

Answer 3. (A) 24

Explanation:

Pattern Series
128 128
 128 × 0.25 64
64 × 0.50 32
32 × .75 24
24 × 1  24 (✓)
24 × 1.25 30

Answer 4. (E) None of these

Explanation:

Series : 1219 652 463 400 379 372
Pattern : -567 -189 -63 -21 -7
×3 ×3 ×3 ×3

Answer 5. (C) 48

Explanation:

There are two number series in this question:

I. 77, 67, 53, 35

77 − 10 = 67

67 − 14 = 53

53 − 18 = 35

 

II. 24, 34, ?, 66

24 + 10 = 34

34 + 14 = 48

48 + 18 = 66

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