Number series reasoning questions for SBI Clerk. SBI Po and Clerk banking questions on number series. Questions from previous asked banking question papers are given below.

**Number Series for SBI Clerk:**

75 SBI Clerk Mocks & Sectionals – Rs. 360

Download all SBI Clerk questions and Answers PDFÂ

For more questions visit SBI Clerk Previous question papers (solved)

**Instructions (1 – 5):**

What should come in place of question mark (?) in the following numbers series

**Question 1:** 12, 6.5, 7.5, 12.75, 27.5, 71.25, ?

a) 225.75

b) 216.75

c) 209.75

d) 236.75

e) 249.75

**Question 2:** 16, 24, 36, 54, 81, 121.5 ?

a) 182.25

b) 174.85

c) 190.65

d) 166.55

e) 158.95

**Question 3:** 12, 12, 18, 45, 180, 1170, ?

a) 13485

b) 14675

c) 15890

d) 16756

e) 12285

**Question 4:** 22, 23, 27, 36, 52, 77, ?

a) 111

b) 109

c) 113

d) 117

e) 115

**Question 5:** 16, 14, 24, 66, 256, 1270, ?

a) 8564

b) 5672

c) 4561

d) 7608

e) 6340

Take a Free SBI Clerk Mock test

**Instructions (6 – 10):**

Find the wrong number in given series sequence.

**Question 6:** 1, 4, 15, 64 325, 1955

a) 15

b) 64

c) 325

d) 1955

e) None of these

**Question 7:** 6, 12, 21, 33, 49, 66

a) 21

b) 33

c) 49

d) 66

e) None of these

**Question 8:** 6, 11.5, 19, 28.5, 41

a) 6

b) 11.5

c) 41

d) 28.5

e) None of these

**Question 9:** 5, 26, 82, 214, 401, 702

a) 26

b) 82

c) 214

d) 401

e) None of these

**Question 10:** 5,20,73,274,1049

a) 20

b) 73

c) 274

d) 1049

e) None of these

SBI Clerk Previous question Papers

SBI Clerk Expected Cut off 2018

**Solutions for Number Series Questions for SBI Clerk:**

**Solutions:**

**1) Answer (B)**

The given series is based on the following sequence,

(12+1)*0.5 = 6.5

(6.5+1)*1 = 7.5

(7.5+1.5)*1.5=12.75

(12.75+1)*2 = 27.5

(27.5+1)*2.5 = 71.25

(71.25+1)*3 = 216.75

**2) Answer (A)**

Each number in the series is 1.5 times the preceding number.

Hence, 16*1.5 = 24

24*1.5 = 36

36*1.5 = 54

54*1.5=81

81*1.5 = 121.5

So, the next number is 121.5*1.5 = 182.25

**3) Answer (E)**

The ratio between preceding terms of the sequence are in a fibonacci sequence.

For example, 12/12 = 1

18/12 = 1.5

45/18 = 2.5 (which is 1+1.5)

180/45 = 4 (which is 1.5+2.5)

1170/180 = 6.5 (which is 2.5+4)

Hence, the next ratio would be 4+6.5=10.5

And the required number is 1170*10.5 = 12285

**4) Answer (C)**

The difference between consecutive terms of the series is a perfect square.

For example,

23-22 = 1

27-23 = 4

36-27 = 9

52-36 = 16

77-52 = 25

Hence, the next difference between the numbers will be 36 and the required number is 77+36 = 113

**5) Answer (D)**

The given terms are in the following series,

14 = 16*1 – 2*1

24 = 14*2 – 2*2

66 = 24*3 – 2*3

256 = 66*4 – 2*4

1270 = 66*5 – 2*5

Hence, the next term equals 1270*6 – 2*6 = 7608

Daily SBI Exams GK – Current Affairs test

**6) Answer (D)**

4 = 1*2+2 ; 15 = 4*3+3 ; 64 = 15*4+4 ; 325 = 64*5+5 ; 1956 = 325*6+6

The nth term is of the form,

$$T_n=(T_{n-1}\times n)+n$$

The last term does not follow the pattern and is thus the wrong number in the sequence.

**7) Answer (C)**

2*2+2 = 6 ; 3*3+3 = 12 ; 4*4 + 5= 21 ; 5*5 +8 = 33 ; 6*6 + 12 = 48

**8) Answer (C)**

1.5*2 + 3 = 6

2.5*3 + 4 = 11.5

3.5*4 + 5 = 19

4.5*5 + 6 = 28.5

5.5*6 + 7 = 40

**9) Answer (C)**

1*2+3=5 ; 4*5+6 = 26 ; 8*9+10 = 82 ; 13*14+15 = 212 ; 19*20 + 21 =401 ; 26*27 +28 = 702

**10) Answer (C)**

1^2 + 4= 5 ; 2^2 + 16 = 20 ; 3^2 + 64 = 73 ; 4^2 + 256 = 272 ; 5^2 + 1024 = 1049

Number series questions of SBI Clerk & Po might have very useful to you, for more banking number series practice

[…] Number Series […]