**Number Series Questions For IBPS PO PDF:-**

Download Number Series Questions For IBPS PO PDF. Practice IBPS PO Number series questions with solutions for Banking exams based on asked questions in previous papers.

Download Number Series Questions For IBPS PO PDF

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**Instructions:** Instructions: In the following number series only one number is wrong. Find out the wrong number.

**Question 1:** 7, 12, 40, 222, 1742, 17390, 208608

a) 7

b) 12

c) 40

d) 1742

e) 208608

**Question 2:** 6, 91, 584, 2935, 11756, 35277, 70558

a) 91

b) 70558

c) 584

d) 2935

e) 35277

**Question 3: **9050, 5675, 3478, 2147, 1418, 1077, 950

a) 3478

b) 1418

c) 5673

d) 2147

e) 1077

**Question 4: **1, 4, 25, 256, 3125, 46656, 823543

a) 3125

b) 823543

c) 46656

d) 25

e) 256

**Question 5:** 8424, 4212, 2106, 1051, 526.5, 263.25, 131.625

a) 131.625

b) 1051

c) 4212

d) 8424

e) 263.25

**Instructions:** In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

**Question 6: **5531 5506 5425 5304 5135 4910 4621

a) 5531

b) 5425

c) 4621

d) 5135

e) 5506

**Question 7: **6 7 9 13 26 37 68

a) 7

b) 26

c) 69

d) 37

e) 9

**Question 8:** 1 3 10 36 152 760 4632

a) 3

b) 36

c) 4632

d) 760

e) 152

**Question 9:** 4 3 9 34 96 219 435

a) 4

b) 9

c) 34

d) 435

e) 219

**Question 10: **157.5 45 15 6 3 2 1

a) 1

b) 2

c) 6

d) 157.5

e) 45

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__Answers & Solutions:__

**1) Answer (D)**

(7-1) x 2 = 12

(12 – 2) x 4 = 40

(40 – 3) x 6 = 222

(222 – 4) x 8 = 1744 ≠ 1742

(1744 – 5) x 10 = 17390

(17390 – 6) x 12 = 208608

**2) Answer (C)**

$6 x 7 + 7^2 = 91 , 91 x 6 + 6^2 = 582 ≠ 584 , 582 x 5 + 5^2 = 2935,…$

**3) Answer (E)**

$9070 – 15^3 = 5675 , 5675 – 13^3 = 3478 , 3478 – 11^3 = 2147 , 2147 – 9^3 = 1418 ,\\

1418 – 7^3 = 1075 ≠ 1077 , 1075 – 5^3 = 950$

**4) Answer (D)**

$1^1 = 1 , 2^2 = 4 , 3^3 = 27 ≠ 25 , 4^4 = 256 , 5^5 = 3125 , 6^6 = 46656 , 7^7 = 823543$

**5) Answer (B)**

$\frac{8424}{2}$ = 4212

$\frac{4212}{2}$ = 2106

$\frac{2106}{2}$ = 1053 ≠ 1051

$\frac{1051}{2}$ = 526.5

$\frac{525.5}{2}$ = 263.25

$\frac{263.25}{2}$ = 131.625

**6) Answer (A)**

5531 – $5^2$ = 5506

5506 – $9^2$ = 5425

5425 – $11^2$ = 5304

5134 – $13^2$ = 5135

5135 – $15^2$ = 4910

4910 – $17^2$ = 4621

Ever number after 5531 has a difference of a square.

Hence 5531 is the wrong number.

**7) Answer (D)**

6 + 1 = 7

7 + 2 = 9

9 + 4 = 13

13 + 13 = 26

26 + 11 = 37

37 + 22 = 69

The number to be added is increasing everytime except for 37 where 11 is added after 13.

**8) Answer (D)**

(1 x 1) + 2 = 3

(3 x 2) + 4 = 10

(10 x 3) + 6 = 36

(36 x 4) + 8 = 152

(152 x 5) + 10 = 770 ≠760

(770 x 6) + 12 = 4632

**9) Answer (D)**

$0^2$ + 4 = 4

$1^2$ + 2 = 3

$3^2$ + 0 = 9

$6^2$ – 2 = 34

$10^2$ – 4 = 96

$15^2$ – 6 = 219

$21^2$ – 8 = 433 ≠ 435

**10) Answer (A)**

157.5 ÷ 3.5 = 45

45 ÷ 3 = 15

15 ÷ 2.5 = 6

6 ÷ 2 = 3

3 ÷ 1.5 = 2

2 ÷ 1 = 2 ≠ 1

To know more about the exam, try reading our other blogs on how to prepare for IBPS PO cloze test, 8 tips to improve English for IBPS PO and how to prepare for high-level data interpretation for IBPS PO.