# Number Series III – Number Series Questions based on Different kinds of Logic For IBPS PO Exam

In this post, we will discuss Number Series Questions that are based on different logic's and solve them using Number Series Tricks to save time in IBPS PO Exam
Number series are series in which particular numbers are present in a particular order and the missing numbers are to be found. Number series is an important part of  IBPS PO Exam. These number series questions check your ability to think and analyze in the exam. There are different types of series which can be solved using number series tricks and formulae.

This is the third post on the topic of number series. In our previous posts, we have discussed Number Series Questions on Trivial Series and Arithmetic, Geometry and Harmonic progression.
Example 1: Number Series Questions based on Different Kinds of Logic

Question: 705, 728, 774, ?, 935, 1050

Solution:

To solve this number series question, we need to understand that the series is present in an increasing order. The logic behind this series is that the difference between two consecutive terms is the multiple of 23.

Therefore, the missing number is 843.

Example 2: Number Series Questions based on Different Kinds of Logic

Question: 3, 5, 8, 11, 17, 23, 30

Solution:

In this number series question, we need to find the wrong number that is placed in the series.
When we observe the series, we find that the series is increasing gradually. To find the logic behind the series, we can take the difference between two numbers.

When we subtract 3 from 5 we get 2, 8 from 5 we get 3 and when we keep on continuing the process we find that the pattern of the differences is disturbed.
We see that 3 and 6 are repeating again breaking the pattern in between. If we assume that the differences are in the series of natural numbers starting from 2, then 4 should be placed in the place of 3 and 5 should be placed in the place of 6. When we verify the answer we get 11 is the number that is suppose to be substituted with 12 since, 12 - 8 = 5 and 17 - 12 = 6.

Therefore, the wrong number in the series is 11.

Example 3: Number Series Questions based on Different Kinds of Logic

Question: 18, 21, 16, 23, 12, 25, ?

Solution:
In this number series question, we need to find the missing number. When we look at the series we find that the series is increasing and decreasing. To find the logic behind the series, we need to find the differences between the terms.
We figure out the differences are all the prime numbers starting from 3 and every alternate prime number is negative.
Therefore, the missing number is 8.

These types of questions are frequently asked in IBPS PO Exam. Since, the IBPS PO Exam is just about 45 days away, start your preparation now!
Example 4: Number Series Questions based on Different Kinds of Logic

Question: 188, 186, ?, 174, 158, 126

Solution:
To solve this number series question, we need to understand the logic behind the series. When we observe the series we find that the series is decreasing gradually. When we find the differences between the two terms, we observe that the differences are in the powers of 2, where the powers are increasing constantly.

Therefore, the missing number is 182.

Example 5: Number Series Questions based on Different Kinds of Logic

Question:  8, 9, 13, 22, 36, 63

Solution:
In this number series question, we need to find the missing number.
When we observe the series, we find that the series is increasing gradually. To find the logic behind the series, we need to find the differences between the two terms.
When we observe the differences between two terms, we find that the differences are the square of the natural numbers starting from 1.
Therefore, 4² = 16 and 5² = 25, when we put the correct squares in the differences, we get to know that 36 is the wrong number that is placed in the series instead, 38 should be placed in the place of 36.
Therefore, 36 is the incorrect number.

Do write in the comment section, how this blog helped you to solve number series questions.

Stay tuned for more number series questions.

#### 1 comment:

1. Really Helpfull Sir........................