Ch.14 :- Number Series :- Exercise 1


✦ Directions for Q. No. 1 to 15 : In each of the following questions, one number is missing in the series. You have to understand the pattern of the series and then insert the missing number.

(1). 4, 7, 11, 18, 29, 47, ….. , 123, 199
(a) 76
(b) 70
(c) 84
(d) 102
(e) 95

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(2). 2, 6, 12, 20 ,…., 42, 56, 72, 90
(a) 20
(b) 21
(c) 30
(d) 12
(e) 23

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(3). 17, 7, 24, 19, 9, 28, ….. , 8, 31, 27, 10, 37
(a) 20
(b) 21
(c) 18
(d) 12
(e) 23

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(4). 6, 126, …., 9, 108, 12, 7, 133, 19, 12, 72, 6
(a) 21
(b) 23
(c) 30
(d) 35
(e) 40

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(5).  2…., 8, 16, 32, 64, 128, 256
(a) 2
(b) 3
(c) 5
(d) 4
(e) None of these

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(6). 45, 54, 47, …., 49, 56, 51, 57, 53
(a) 48
(b) 55
(c) 50
(d) 53
(e) None of these

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(7). 3, 128,6, 64, 9, …., 12, 16, 15, 8
(a) 32
(b) 12
(c) 108
(d) 72
(e) 64

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(8). 5, 7, 11, 19, 35, 67, …., 259
(a) 64
(b) 131
(c) 135
(d) 32
(e) None of these

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(9).  8, 4, 12, 6, 18, …., 27
(a) 10
(b) 12
(c) 18
(d) 24
(e) None of these

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(10). 16, 22, 34, 58, 106, …..,
(a) 178
(d) 170
(c) 288
(b) 175
(e) 202

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(11). 2, 3, 5, 9, 17, 33, ….
(a) 85
(c) 63
(b) 37
(d) 64
(e) 65

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(12). 2, 9, 23, 3, 8, 25, 4, …., 27
(a) 7
(b) 29
(c) 23
(d) 14
(e) 20

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(13). 121, 112, …., 97, 91, 86
(a) 102
(b) 108
(c) 99
(d) 104
(e) 101

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(14). 6, 9, 15, 27, …., 99.
(a) 51
(b) 34
(c) 37
(d) 84
(e) None of these

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(15). 4, 7, 12, …. , 28, 39
(a) 19
(b) 24
(c) 14
(d) 16
(e) None of these

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✦ Directions for Q. No. 16 to 22 : Find the missing number in the following series :

(16). 83, 82, 81, …., 69, 60, 33
(a) 73
(b) 80
(c) 75
(d) 77
(e) None of these

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(17). 77, 78, 77, 81, 73, …, 55
(a) 69
(b) 71
(c) 82
(d) 89
(e) None of these

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(18). 6, 7, 9, 13, 21, …..
(a) 25
(b) 29
(c) 37
(d) 32
(e) None of these

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(19). 5, 7, …., 9, 7, 11, 8, 13,
(a) 8
(b) 6
(c) 19
(d) 7
(e) None of these

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(20). 4, 8, 12, 24,36, 72, ….
(a) 108
(b)98
(c) 92
(d) 96
(e) None of these

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(21). 1, 2, 3, 5, 7, ….
(a)8
(b) 9
(c)10
(d) 13
(e) None of these

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(22). 3, 6, 6, 12, 9, …., 12
(a) 15
(b) 18
(c) 11
(d) 13
(e) None of these

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✦ Directions for Q. No. 23 to 31 : In each of the following questions, one number is wrong in the series. Find out the wrong number.

(23). 3, 5, 12, 39, 154, 772, 4634
(a) 5
(b) 3
(c) 39
(d) 154
(e) None of these

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(24). 376, 188, 88, 40, 16, 4, -2
(a)4
(b) 16
(c) 40
(d) 188
(e) None of these

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(25). 444, 300, 200, 136, 87, 84, 80
(a) 200
(b) 136
(c) 87
(d) 80
(e) None of these

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(26). 2, 3, 12, 37, 86, 166, 288
(a) 2
(b) 3
(c) 166
(d) 86
(e) 37

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(27). 4, 9, 19, 43, 90. 185, 375
(a) 9
(b) 19
(c) 90
(d) 185
(e) None of these

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(28). 572, 284, 140, 72, 32, 14, 5
(a) 14
(b) 32
(c) 72
(d) 5
(e) 140

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(29). 4, 10, 23, 50, 104, 216, 239
(a) 4
(b) 10
(c) 23
(d) 104
(e) 216

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(30). 701, 348, 173, 85, 41, 19, 8
(a)173
(b) 41
(c) 19
(d) 8
(e) 348

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(31). 2, 3, 9, 27, 112, 565, 3396
(a) 565
(b) 9
(c) 112
(d) 27
(e) 3396

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✦ Directions for Q. No. 32 to 36 : In each of the following number series, two terms have been put within brackets. Mark in the answer sheet:

(32). 3, 10, 29, (66), (127), 218
(a) if the terms in both the brackets are right.
(b) if the term in the first bracket is right but the term in the second bracket is wrong.
(c) if the term in the first bracket is wrong but the term in the second bracket is right.
(d) if the terms in both the brackets are wrong.

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(33). (2) 5, (12), 25, 41, 61
(a) if the terms in both the brackets are right.
(b) if the term in the first bracket is right but the term in the second bracket is wrong.
(c) if the term in the first bracket is wrong but the term in the second bracket is right.
(d) if the terms in both the brackets are wrong.

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(34). 4, 7, (9), 10, 13, 15, (16), 19
(a) if the terms in both the brackets are right.
(b) if the term in the first bracket is right but the term in the second bracket is wrong.
(c) if the term in the first bracket is wrong but the term in the second bracket is right.
(d) if the terms in both the brackets are wrong.

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(35). 2, 3, (6), 11, 18, (30), 38
(a) if the terms in both the brackets are right.
(b) if the term in the first bracket is right but the term in the second bracket is wrong.
(c) if the term in the first bracket is wrong but the term in the second bracket is right.
(d) if the terms in both the brackets are wrong.

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(36). 4, 6, 10, (12), 16, (14), 22
(a) if the terms in both the brackets are right.
(b) if the term in the first bracket is right but the term in the second bracket is wrong.
(c) if the term in the first bracket is wrong but the term in the second bracket is right.
(d) if the terms in both the brackets are wrong.

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