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Number series Basics, Expected Questions, 2004 to 2017 MCQs | CBSE UGC NET | All Competitive Exams

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Contents
Number Series

  • Basics
  • Practice Questions
  • Previous year Questions
  • Expected Question


Basics- Types of Number Series

Type 1 add or subtract

Type 2 constant times like multiple + something or - something constant

Type 3  x .5 x 1 x1.5 with + - mixture of type 2 and 3

Type 4 Time increasing or decreasing with + -

Type 5 Ups and down with + or - , multiply divide

Type 6 Series

Directions (1-10): What will come in place of the question marks (?) in the following Number series?

11, 14, 19, 22, 27, 30, ?
A.  39
B.  34
C.  36
D.  35
E.  None of these

73205, 6655, 605, 55, ?
A.  9
B.  5
C.  13
D.  11
E.  None of these
(B)
5 x 11 = 55,
55 x 11 = 605,
605 x 11 = 6655,
6655 x 11 = 73205
What is the next number of the following sequence.
9, 7, 7, 9, 13, ...
3^2 = 9 = 9 (sum of digit)
4^2 = 16 = 7 (Sum of digit)
5^2 = 25 = 7 (Sum of digit)
6^2 = 36 = 9 (Sum of digit)
7^2 = 49 = 13 (Sum of digit)
Similarly
8^2 = 64 = 10 (Sum of digit)

1.      6,8,13,23,?,66

2.      7,8,18,57,232,?

3.      109,110,102,129,65,?
4.      4,18,46,102,?,438

5       515, 507, 480, 416, ?, 75

6       12, 7, 8, 17, 69, ?



December 2004
In the sequence of numbers
2/3, 4/7, X, 11/21, 16/31
The missing number X is:
(A) 8/10
(B) 6/10
(C) 5/10
(D) 7/13
Answer D
December 2005
Insert the missing number:
8  24  12  ?  18  54
(A) 26
(B) 24
(C) 36
(D) 32

June 2006
Insert the missing number: 16/32,    15 /33,   17/31,   14/34        ?
(A) 19/35
(B) 19/30
(C) 18/35
(D) 18/30
Answer D
December 2006
1. In the sequence of numbers 8, 24, 12, X, 18, 54 the missing number X is:
(A) 26
(B) 24
(C) 36
(D) 32
Answer C
June 2007
Which is the number that comes next in the sequence?
9, 8, 8, 8, 7, 8, 6, ?     
(A) 5
(B) 6
(C) 8
(D) 4

December 2007

Find out the number which should come at the place of question mark which will complete the following series: 5, 4, 9, 17, 35, ? = 139
(A) 149


(B) 79
(C) 49
(D) 69
Answer D
December 2007

Insert the missing number: 36/62 ,  39/63,  43/61, 48/64, ?
(A) 51/65
(B) 56/60
(C) 54/65
(D) 33/60

December 2007
Choose the number which is different from others in the group:
(A) 49
(B) 63
(C) 77
(D) 81
Answer D

Insert the missing number:   4 : 17 : : 7 : ?  
(A) 48
(B) 49
(C) 50
(D) 51
Answer C

2007

Which number is missing in the following series?
2, 5, 10, 17, 26, 37, 50, ?
(A) 63
(B) 65
(C) 67
(D) 69
Answer B


June 2008

Insert the missing number in the following series:
4          16        8          64        ?          256
(A) 16
(B) 24
(C) 32
(D) 20

December 2008

1. Insert the missing number in the following:
2/3, 4/7, ? , 11/21, 16/31
(A) 10/8
(B) 6/10
(C) 5/10
(D) 7/13


Find out the wrong number in the sequence:
125, 127, 130, 135, 142, 153, 165
(A) 130
(B) 142
(C) 153
(D) 165
Answer D
June 2009
1. Insert the missing number in the following:
3, 8, 18, 23, 33, ?, 48
(A) 37
(B) 40
(C) 38
(D) 45
Answer C
June 2009

Find out the wrong number in the sequence. 52, 51, 48, 43, 34, 27, 16
(A) 27
(B) 34
(C) 43
(D) 48

December 2009
The next number in the series 2, 5, 9, 19, 37, ? will be
(A) 74
(B) 75
(C) 76
(D) None of the above



December 2010

Find the wrong number in the sequence: 52, 51, 48, 43, 34, 27, 16
(A) 27
(B) 34
(C) 43
(D) 48
Answer B
June 2010

Find the next number in the following series:
2, 5, 10, 17, 26, 37, 50, ?
(A) 63
(B) 65
(C) 67
(D) 69
Answer B
June 2011

Find the wrong number in the sequence
125, 127, 130, 135, 142, 153, 165
(A) 130
(B) 142
(C) 153
(D) 165
December 2011

What is the number that comes next in the sequence?
2, 5, 9, 19, 37, ___
(A) 76
(B) 74
(C) 75
(D) 50
Answer C
June 2012

Which is the number that comes next in the following sequence?
2,  6,  12,  20,  30,  42,  56, _____
(A) 60
(B) 64
(C) 72
(D) 70
Answer C
December 2012

The missing number in the series :
0, 6, 24, 60, 120, ?, 336, is
(A) 240
(B) 220
(C) 280
(D) 210
Answer D
First Number = 1 *2 *3 = 6
Second Number = 2*3*4 = 24
Third Number = 3*4*5 = 60
Fourth Number = 4*5*6 = 120
Fifth Number = 5*6*7 = 210
Sixth Number = 6*7*8 = 336.


2*2*2-2=6
3*3*3-3=24
4*4*4-4=60
5*5*5-5=120
6*6*6-6=210
7*7*7-7=336.

June 2013

The missing number in the series

40, 120, 60, 180, 90, ?, 135 is
(A) 110
(B) 270
(C) 105
(D) 210
September 2013

The missing term in the series 2, 7, 24, 77, ?, 723 is
(A) 238
(B) 432
(C) 542
(D) 320


June 2014

lf the series 4,5,8,13,14,17,22,........ is continued in the same pattern, which one of the following is not a term of this series?
(A) 31
(B) 32
(C) 33
(D) 35


December 2014


The next term in the series: 2, 7, 28, 63, 126, --- is
(A) 215
(B) 245
(C) 276
(D) 296
June 2015
1. The next term in the series is : 2, 5, 9, 19, 37, ?
(A) 83
(B) 75
(C) 78
(D) 80
Answer B
July 2016

In the series
3, 11, 23, 39, 59, ..........
(A) 63
(B) 73
(C) 83
(D) 93
August 2016

In the series
1, 5, 13, 25, 41, …….
the next term is
(A) 59
(B) 63
(C) 61
(D) 68

Jan 2017

The missing term in the series
1, 4, 27, 16, ?, 36, 343, … is

(1) 30
(2) 49
(3) 125
(4) 81
Nov 2017
In the series 1, 6, 15, 28, 45 … the next term will be:
(a) 76
(b) 56
(c) 84
(d) 66



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