Aptitude Questions are common in various competitive exams, including Banking exams.

In this article, we have given you 10 **Free Banking aptitude Questions** with detailed answers and explanations so that you can solve these and prepare for various online exam preparation, various interviews, Logical Reasoning Categories online tests and more.

**10 NUMBER SERIES BANKING APTITUDE QUESTIONS**

**(Q1-Q5) What will come in place of the blank (__) in each of the following series?**

**Q1. 2, 5, 9, 19, 37, __**

**OPTIONS**

A. **73**

B. **74**

C. **75**

D. **76**

E. **77**

ANS: C. **75**

SOLUTION:

2*2+5=9

5*2+9=19

9*2+19=37

19*2+37=75

Therefore with this logic, the answer is **75**.

**Q2. 32, 40, 24, 16, 24, __**

**OPTIONS**

A. **12**

B. **18**

C. **8**

D. **32**

E. **64**

ANS: C. **8**

SOLUTION:

As the 3rd number is less then 2nd,

Let's assume a numbers needs to be substracted or divided

Now, lets apply a logic,

32+8=40

32-8=24

Now lets apply the same logic again,
16+8=24

16-8=8

Therefore the ans is 8

#### **Q3. 6, 7, 11, 20, 36, __**

**OPTIONS:**

A. **66**

B. **61**

C. **68**

D. **62**

E. **64**

ANS: B. **61**

SOLUTION:

We can see,

7-6= 1 =1*1

11-7= 4 =2*2

20-11= 9 =3*3

36-20= 16 =4*4

Now lets apply the same logic again we get,
36+(5*5)=61

Therefore the ANS is **61**

**Q4. 7, 8, 18, 57, __, 1165**

**[SBI-PO 2017]**

**OPTIONS:**

A. **212**

B. **217**

C. **232**

D. **247**

E. **275**

ANS: C. **232**

SOLUTION:

7x1+1=8

8x2+2=18

18x3+3=57

57x4+4=232

232x5+5=1165

Therefore the ANS is **232**

**Q5. 77, 85, 69, 101, 37, __**

**[SBI-PO 2017]**

**OPTIONS:**

A. **105**

B. **125**

C. **145**

D. **165**

E. **185**

ANS: D. **165**

SOLUTION:

77+(8x1)=85

85-(8x2)=69

69+(8x4)=101

101-(8x8)=37

27+(8x16)=165

Therefore the ANS is **165**

### (Q6-Q10) A number in the series is wrong. Find the wrong number.

**Q6. 59, 60 ,61 ,64 ,79 ,185 ,1129**

**[SBI-PO 2018]**

**OPTIONS:**

A. **185**

B. **61**

C. **60**

D. **1129**

E. **79**

ANS: A. **185**

SOLUTION:

The differences of the series is 1,3,15,106…

This can be formed on the basis like

1×1,1×3,3×5,15×7..so on

Hence the wrong no. is **185**

**Q7. 291, 147, 75, 39, 22, 12, 7.5**

**[SBI-PO 2018]**

**OPTIONS:**

A. **39**

B. **147**

C.** 22**

D. **7.5**

E. **291**

ANS: C. **22**

SOLUTION:

The series is

291−147=144

147−75=72

75−39=36

39−22=17 but this difference will be 18

So the wrong no. is **22**

**Q8. 3, 9, 19, 32, 51**

**OPTIONS:**

A. **3**

B. **9**

C. **19**

D. **32**

E. **51**

ANS: D. **32**

SOLUTION:

The series is

2x1+1=3

2x4+1=9

2x9+1=19

2x16+1=33 but this is 32

So the wrong no. is **32**

**Q9. 26, 27, 34, 58, 106, 186, 306**

**[SBI-PO 2018]**

**OPTIONS:**

A. **27**

B. **34**

C. **186**

D. **106**

E.** 306**

ANS: A. **27**

SOLUTION:

The series is
26+(1x1)−1=26

26+(3x3)−1=34

34+(5x5)−1=58

58+(7x7)−1=106 and so on…

Hence wrong no. is **27**

**Q10. 1, 3, 9, 31, 129, 652**

**[SBI-PO 2018]**

**OPTIONS:**

A. **1**

B. **3**

C. **652**

D. **31**

E. **129**

ANS: C. **652**

SOLUTION:

The series is

1×1+2=3

3×2+3=9

9×3+4=31

31×4+5=129

129×5+6=651

Hence the wrong no.is **652**

How many could you solve? Comment them down below.