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Number Series
How To Solve Questions with
Short Tricks
By – Entrance Exam Info
Number Series
 Number series tests present numerical sequences that follow a logical rule which is based on
elementary arithmetic.
 An initial sequence is given from which the rule is to be deduced. You are then asked to predict
the next number that obeys the rule.
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Number Series
There are different types of Number Series:
1. Perfect Square Series
2. Perfect Cube Series
3. Geometric Series
4. Arithmetic Sequences
5. Integer Number Sequences
Number Series
Useful for Competitive Exams
Bank Exams
IBPS PO Exam
IBPS Clerk Exam
Railway Exams
SSC Exams
RRB NTPC Exam
RRB JE/SSE Exams
SSC CGL Exam
SSC CHSL Exam
IBPS RRB Exam
RRB ALP, Group D Exams
 4 - 5 Questions are asked in competitive Exams which are based on Number Series.
 You can easily learn How to solve this type of problem.
Number Series
Ques 1. Look at this series: 7, 10, 8, 11, 9, 12 . . . . . What number should come next?
This is a simple alternating addition and subtraction series. In the first pattern 3 is added & in the second 2 is subtracted.
7
10
+3
8
-2
11
+3
So Answer is = 12 – 2 = 10
9
-2
12
+3
Number Series
Ques 2. What should be the next number in this series?
3, 5, 35, 10, 12, 35, 17 . . . . .
This Series follows this Pattern =
Again
3
5
+2
+2
+2
35
+5
+5
+5
then 35
then 35
10
35
35
12
+2
So Answer is = 17 + 2 = 19
+5
17
Number Series
Ques 3. What number should fill the blank?
F 2, __ , D 8 , C 16 , B 32
The letters decrease by 1 & the numbers are multiplied by 2
F2
__
D8
So Answer is = E 4
C 16
B 32
Important Links to Help You
 IBPS PO Previous Year Question Papers
 IBPS PO Recruitment Exam 2016-17
 SSC CGL Previous Year Question Answers
 SSC CHSL Recruitment 2016-17
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