29 July 2019
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Study Notes for All Bank Exams: Quantitative Aptitude (Number Series)

In this post we have provided Study Notes of Number Series for all bank exams. These notes will be useful for all prestigious exams like IBPS, SBI, NABARD, RBI etc. In Banking or insurance exams, generally, two types of number series are asked. First one is Missing Number Series in which some numbers are given which are following a certain pattern. The student is expected to find out the missing number.

The second one is the Wrong Number Series in which some numbers are given but one number is wrong and does not follow the required pattern. The student is expected to find out the wrong number. Following patterns have been frequently asked in banking exams which are further explained below in detail. You can also go through Average: Notes, Concept & Shortcut for bank exams.

Single-stage difference

1. 3, 23, 63, ?, 303 , 623 (Ans: 143)

Pattern is:

+ 20, + 40, + 80, + 160, ………

2. 240, 205, 177, 156, 142, ? (Ans: 135)

Pattern is:

- 35, - 28, - 21, - 14, ………

Double stage difference

3. 12, 20, 30, 43, 60, ? (Ans: 82)

Pattern is:

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