20 Number Series Questions with Tips and Tricks (Latest Pattern)

For All Banking Exams, IBPS PO, SBI PO, SSC CGL

How to Solve Number Series Questions ?

First of All for solving these types of questions, You need to practice daily to understand the logic behind it. In these types of questions there is no certain Tricks, You need to judge from the pattern of the questions. But today we will tell you some basic patterns, It may help to understand the Logic – Before solving questions try to understand the pattern from the below questions. Take your time, don't see answers or explanations. First Try to solve it by own. 

Generally in these types,  Questions may be asked in 2 ways -

• To find the missing Number in the series.
• To find the wrong one in the series.

Today we will discuss both types of questions. Try to solve it by own. If anyone need solution just give your comment. our team members will tell you the logic. 

Types of Pattern:

Type 1. Prime Number Series 

In these Types of Questions you will get a series of Prime Number or -1, +1, etc. Here, We will explained the types of series in Prime Number. It may be +2, -2, +3, -3, ...... You need to understand the pattern from the Questions........

Series 1 - 2, 3, 5, 7, 11, 13, 17, 19, 23 .......... (Means its based on Prime Numbers)

Series 2 - 1, 2, 4, 6, 10, 12, 16, 18, 22, ..........(Means its based on Prime Numbers -1)

Series 3 - 3, 4, 6, 8, 12, 14, 18, 20, 24, ..........(Means its based on Prime Numbers +1)

Type 2. Difference between the numbers
In these Types of Questions you will get same difference, either in + or - ..... The Series will be either increasing or decreasing. Its very very easy to understand. Now These days you won't get these types of  questions directly. 
Series 1 - 2, 4, 6, 8, 10, 12, 14, 16, 18 .............. (Means its increasing with +2)
Series 2 - 23, 21. 19, 17, 15, 13, 11, 9, 7, ..........(Means its decreasing with -2)

So you need to be smart wile solving these types of questions- Try to understand the below pattern (Its also based on Difference between numbers)

Type 3. Difference between the numbers - ${{x}^{2}},{{x}^{3}}$ 

Series 1 -  1, 2, 6, 15, 31, 56 .......  

Series 2 - 56, 31, 15, 6, 2, 1 ........ (Just Reverse of Series 1)

Type 4. Difference between the number is - ${{x}^{2}}+1,{{x}^{3}}+1,{{x}^{2}}+x,{{x}^{2}}-x,{{x}^{2}}+2,{{x}^{2}}-2,.....$ 

In these types you will get the difference like this.... It may be + or - but the order is same. You before solving try to find out the difference then apply all these to find out the actual tricks. 

Now Start Solving the below Questions

Directions (Q.1 –Q.3): In the following number series one number is wrong. Find out the wrong number.

Question 1. 

•  2, 3, 10, 38, 172, 885

1) 3
2) 172
3) 38
4) 10
5) 885

Question 2. 

•  9, 25, 90, 488, 2926, 20480

1) 90
2) 488
3) 20480
4) 25
5) 2926

Question 3. 

•  134, 141, 152, 167, 185, 209

1) 167
2) 185
3) 152
4) 141
5) 209

Directions (Q.4-Q.6): What value should come in the place of question mark (?) in the following number series?

Question 4. 

•  21, 25, 59, 193, ?

1) 797
2) 787
3) 794
4) 782
5) 789

Question 5. 

•  27, 44, 65, 90, ?

1) 109
2) 121
3) 115
4) 119
5) 117

Question 6. 

•  19, 19, 133, 1729, ?

1) 32851
2) 34851
3) 32861
4) 32751
5) 33149

Answer 1. 3
Answer 2. 1
Answer 3. 2
Answer 4. 1
Answer 5. 4
Answer 6. 1