**Number Series Reasoning Material for All Competitive Exams | PDF Download**

**Number Series**

In this catagory of questions, generally a long series of numbers is given. The candidate is required to find out how many times a number satisfying the condition specified in the question will occur.

**Example** – How many 9’s are there in the following number sequence which are immediately preceded by 5 but not immediately followed by 3 ?

3 9 5 9 4 5 9 3 7 9 8 5 9 9 8 7 9 5 1 9 6 5 9 4 3 9 5 9 3 8

(1) One (2) Two (3) Three (4) Four (5) More than four

The numbers satisfying the given conditions can be shown as follows (Given in BOLD).

3 9 5 9 4 5 9 3 7 9 8 5 9 9 8 7 9 5 1 9 6 5 9 4 3 9 5 9 3 8

So, the answer is (3)

**Ranking Test**

In this, generally the ranks of a person both from the top and from the bottom will be mentioned and the total number of persons is to be found.

Example – Radha ranks twentyfirst from the top and twentieth from the bottom in a certain examination. How many students are there in her class?

(1) 40 (2) 41 (3) 42 (4) 45 (5) None of these

Clearly the whole class consists of

- 20 students who have a rank higher than Radha
- Radha
- 19 students who have rank lower than Radha i.e. (20 + 1 + 19) = 40. So, the answer is (1)

**Number Series Reasoning Material for All Competitive Exams** ( Download Pdf)

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