Wrong number series questions are a vital part of the reasoning and quantitative aptitude sections in bank exams like IBPS PO, SBI PO, RBI Assistant, IBPS Clerk, and SBI Clerk. These questions require candidates to identify the number in a sequence that does not follow the established pattern. Typically, 3-5 questions appear in prelims and 5-8 in mains, contributing to sections worth 35-50 marks.
Below are 100 multiple-choice questions (MCQs) on wrong number series, designed to reflect the patterns and difficulty levels of bank exams (e.g., arithmetic, geometric, mixed series). Each question includes four options, with answers and explanations provided at the end to aid preparation.
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100 Wrong Number Series Questions for Bank Exams
Directions: For each question, identify the number in the series that does not follow the pattern and select the correct option (A, B, C, or D).
1. 2, 5, 11, 20, 32, 50
(A) 5
(B) 11
(C) 20
(D) 32
2. 3, 9, 27, 80, 243, 729
(A) 9
(B) 27
(C) 80
(D) 243
3. 1, 4, 9, 16, 24, 36
(A) 4
(B) 9
(C) 16
(D) 24
4. 7, 14, 28, 56, 113, 224
(A) 14
(B) 28
(C) 113
(D) 224
5. 1, 2, 6, 15, 31, 56
(A) 2
(B) 6
(C) 15
(D) 31
6. 4, 8, 14, 23, 35, 50
(A) 8
(B) 14
(C) 23
(D) 35
7. 10, 11, 13, 16, 18, 22
(A) 11
(B) 13
(C) 16
(D) 18
8. 2, 3, 5, 8, 11, 13
(A) 3
(B) 5
(C) 8
(D) 11
9. 100, 50, 25, 13, 6.25
(A) 50
(B) 25
(C) 13
(D) 6.25
10. 1, 3, 12, 60, 360, 2520
(A) 3
(B) 12
(C) 60
(D) 360
11. 8, 27, 64, 126, 216, 343
(A) 27
(B) 64
(C) 126
(D) 216
12. 2, 5, 11, 20, 34, 47
(A) 5
(B) 11
(C) 20
(D) 47
13. 1, 1, 2, 3, 6, 8
(A) 1
(B) 2
(C) 6
(D) 8
14. 4, 12, 24, 41, 60, 84
(A) 12
(B) 24
(C) 41
(D) 60
15. 3, 6, 18, 71, 360, 2160
(A) 6
(B) 18
(C) 71
(D) 360
16. 7, 8, 10, 13, 15, 20
(A) 8
(B) 10
(C) 13
(D) 15
17. 1, 5, 14, 31, 54, 91
(A) 5
(B) 14
(C) 31
(D) 54
18. 2, 4, 12, 47, 240, 1440
(A) 4
(B) 12
(C) 47
(D) 240
19. 6, 12, 36, 143, 720, 8640
(A) 12
(B) 36
(C) 143
(D) 720
20. 1, 2, 5, 11, 24, 44
(A) 2
(B) 5
(C) 11
(D) 24
21. 3, 15, 45, 104, 189, 315
(A) 15
(B) 45
(C) 104
(D) 189
22. 4, 5, 7, 11, 14, 19
(A) 5
(B) 7
(C) 11
(D) 14
23. 2, 8, 20, 39, 62, 92
(A) 8
(B) 20
(C) 39
(D) 62
24. 1, 3, 6, 11, 15, 21
(A) 3
(B) 6
(C) 11
(D) 15
25. 5, 25, 50, 81, 120, 170
(A) 25
(B) 50
(C) 81
(D) 120
26. 2, 4, 10, 23, 44, 94
(A) 4
(B) 10
(C) 23
(D) 44
27. 7, 14, 42, 167, 672, 5040
(A) 14
(B) 42
(C) 167
(D) 672
28. 1, 2, 6, 23, 120, 720
(A) 2
(B) 6
(C) 23
(D) 120
29. 3, 4, 6, 10, 13, 18
(A) 4
(B) 6
(C) 10
(D) 13
30. 10, 20, 60, 239, 960, 5760
(A) 20
(B) 60
(C) 239
(D) 960
31. 1, 4, 10, 18, 31, 46
(A) 4
(B) 10
(C) 18
(D) 31
32. 2, 3, 10, 38, 158, 1105
(A) 3
(B) 10
(C) 38
(D) 158
33. 5, 6, 8, 12, 15, 20
(A) 6
(B) 8
(C) 12
(D) 15
34. 1, 5, 20, 59, 120, 360
(A) 5
(B) 20
(C) 59
(D) 120
35. 3, 12, 36, 89, 216, 630
(A) 12
(B) 36
(C) 89
(D) 216
36. 2, 6, 24, 119, 720, 5040
(A) 6
(B) 24
(C) 119
(D) 720
37. 4, 7, 13, 23, 34, 52
(A) 7
(B) 13
(C) 23
(D) 34
38. 1, 2, 10, 34, 91, 246
(A) 2
(B) 10
(C) 34
(D) 91
39. 6, 18, 36, 61, 90, 126
(A) 18
(B) 36
(C) 61
(D) 90
40. 2, 5, 9, 15, 20, 26
(A) 5
(B) 9
(C) 15
(D) 20
41. 3, 9, 18, 29, 45, 66
(A) 9
(B) 18
(C) 29
(D) 45
42. 1, 3, 8, 15, 28, 56
(A) 3
(B) 8
(C) 15
(D) 28
43. 4, 10, 22, 47, 94, 202
(A) 10
(B) 22
(C) 47
(D) 94
44. 2, 7, 17, 31, 52, 92
(A) 7
(B) 17
(C) 31
(D) 52
45. 5, 15, 30, 51, 70, 105
(A) 15
(B) 30
(C) 51
(D) 70
46. 1, 4, 16, 63, 256, 1024
(A) 4
(B) 16
(C) 63
(D) 256
47. 3, 6, 12, 22, 33, 48
(A) 6
(B) 12
(C) 22
(D) 33
48. 2, 8, 26, 79, 242, 728
(A) 8
(B) 26
(C) 79
(D) 242
49. 7, 8, 16, 42, 108, 404
(A) 8
(B) 16
(C) 42
(D) 108
50. 4, 5, 8, 11, 14, 20
(A) 5
(B) 8
(C) 11
(D) 14
51. 2, 6, 12, 20, 32, 50
(A) 6
(B) 12
(C) 20
(D) 32
52. 3, 9, 27, 82, 243, 729
(A) 9
(B) 27
(C) 82
(D) 243
53. 1, 4, 9, 15, 25, 36
(A) 4
(B) 9
(C) 15
(D) 25
54. 7, 14, 28, 57, 112, 224
(A) 14
(B) 28
(C) 57
(D) 112
55. 1, 2, 6, 14, 31, 56
(A) 2
(B) 6
(C) 14
(D) 31
56. 4, 8, 14, 22, 34, 50
(A) 8
(B) 14
(C) 22
(D) 34
57. 10, 11, 13, 17, 18, 22
(A) 11
(B) 13
(C) 17
(D) 18
58. 2, 3, 5, 7, 10, 13
(A) 3
(B) 5
(C) 7
(D) 10
59. 100, 50, 25, 12.5, 7.25, 3.125
(A) 50
(B) 25
(C) 12.5
(D) 7.25
60. 1, 3, 12, 59, 360, 2520
(A) 3
(B) 12
(C) 59
(D) 360
61. 8, 27, 64, 124, 216, 343
(A) 27
(B) 64
(C) 124
(D) 216
62. 2, 5, 11, 22, 34, 50
(A) 5
(B) 11
(C) 22
(D) 34
63. 1, 1, 2, 4, 5, 8
(A) 1
(B) 2
(C) 4
(D) 5
64. 4, 12, 24, 40, 59, 84
(A) 12
(B) 24
(C) 40
(D) 59
65. 3, 6, 18, 70, 360, 2160
(A) 6
(B) 18
(C) 70
(D) 360
66. 7, 8, 10, 14, 15, 20
(A) 8
(B) 10
(C) 14
(D) 15
67. 1, 5, 14, 30, 53, 91
(A) 5
(B) 14
(C) 30
(D) 53
68. 2, 4, 12, 48, 239, 1440
(A) 4
(B) 12
(C) 48
(D) 239
69. 6, 12, 36, 144, 719, 8640
(A) 12
(B) 36
(C) 144
(D) 719
70. 1, 2, 5, 10, 22, 44
(A) 2
(B) 5
(C) 10
(D) 22
71. 3, 15, 45, 105, 188, 315
(A) 15
(B) 45
(C) 105
(D) 188
72. 4, 5, 7, 10, 13, 19
(A) 5
(B) 7
(C) 10
(D) 13
73. 2, 8, 20, 38, 61, 92
(A) 8
(B) 20
(C) 38
(D) 61
74. 1, 3, 6, 10, 14, 21
(A) 3
(B) 6
(C) 10
(D) 14
75. 5, 25, 50, 80, 119, 170
(A) 25
(B) 50
(C) 80
(D) 119
76. 2, 4, 10, 22, 43, 94
(A) 4
(B) 10
(C) 22
(D) 43
77. 7, 14, 42, 168, 671, 5040
(A) 14
(B) 42
(C) 168
(D) 671
78. 1, 2, 6, 24, 119, 720
(A) 2
(B) 6
(C) 24
(D) 119
79. 3, 4, 6, 9, 12, 18
(A) 4
(B) 6
(C) 9
(D) 12
80. 10, 20, 60, 240, 959, 5760
(A) 20
(B) 60
(C) 240
(D) 959
81. 1, 4, 10, 19, 30, 46
(A) 4
(B) 10
(C) 19
(D) 30
82. 2, 3, 10, 39, 157, 1105
(A) 3
(B) 10
(C) 39
(D) 157
83. 5, 6, 8, 11, 14, 20
(A) 6
(B) 8
(C) 11
(D) 14
84. 1, 5, 20, 60, 119, 360
(A) 5
(B) 20
(C) 60
(D) 119
85. 3, 12, 36, 90, 215, 630
(A) 12
(B) 36
(C) 90
(D) 215
86. 2, 6, 24, 120, 719, 5040
(A) 6
(B) 24
(C) 120
(D) 719
87. 4, 7, 13, 22, 33, 52
(A) 7
(B) 13
(C) 22
(D) 33
88. 1, 2, 10, 35, 90, 246
(A) 2
(B) 10
(C) 35
(D) 90
89. 6, 18, 36, 60, 89, 126
(A) 18
(B) 36
(C) 60
(D) 89
90. 2, 5, 9, 14, 20, 26
(A) 5
(B) 9
(C) 14
(D) 20
91. 3, 9, 18, 30, 44, 66
(A) 9
(B) 18
(C) 30
(D) 44
92. 1, 3, 8, 16, 27, 56
(A) 3
(B) 8
(C) 16
(D) 27
93. 4, 10, 22, 46, 93, 202
(A) 10
(B) 22
(C) 46
(D) 93
94. 2, 7, 17, 32, 52, 92
(A) 7
(B) 17
(C) 32
(D) 52
95. 5, 15, 30, 50, 69, 105
(A) 15
(B) 30
(C) 50
(D) 69
96. 1, 4, 16, 64, 255, 1024
(A) 4
(B) 16
(C) 64
(D) 255
97. 3, 6, 12, 21, 32, 48
(A) 6
(B) 12
(C) 21
(D) 32
98. 2, 8, 26, 80, 241, 728
(A) 8
(B) 26
(C) 80
(D) 241
99. 7, 8, 16, 43, 107, 404
(A) 8
(B) 16
(C) 43
(D) 107
100. 4, 5, 8, 10, 14, 20
(A) 5
(B) 8
(C) 10
(D) 14
Wrong Number Series ANSWERS
Answers: 1. C 2. C 3. D 4. C 5. C 6. C 7. D 8. C 9. C 10. C 11. C 12. D 13. C 14. C 15. C 16. D 17. C 18. C 19. C 20. D 21. C 22. D 23. C 24. C 25. C 26. C 27. C 28. C 29. D 30. C 31. C 32. C 33. C 34. C 35. C 36. C 37. C 38. C 39. C 40. C 41. C 42. C 43. C 44. C 45. C 46. C 47. C 48. C 49. C 50. C 51. C 52. C 53. C 54. C 55. C 56. C 57. C 58. C 59. C 60. C 61. C 62. C 63. C 64. C 65. C 66. C 67. C 68. C 69. C 70. C 71. C 72. C 73. C 74. C 75. C 76. C 77. C 78. C 79. C 80. C 81. C 82. C 83. C 84. C 85. C 86. C 87. C 88. C 89. C 90. C 91. C 92. C 93. C 94. C 95. C 96. C 97. C 98. C 99. C 100. C
Wrong Number Series Answer Explanations:
1. Pattern: Differences are 3, 6, 9, 12, 18 (increase by 3, 3, 3, 6). Correct series: 2, 5, 11, 20, 32, 50. 20 is correct (11 + 9 = 20). Answer: C.
2. Pattern: Geometric, multiply by 3 (3 × 3 = 9, 9 × 3 = 27, 27 × 3 = 81, …). 80 should be 81. Answer: C.
3. Pattern: Squares (1², 2², 3², 4², 5², 6²). 24 should be 25 (5²). Answer: D.
4. Pattern: Multiply by 2 (7 × 2 = 14, 14 × 2 = 28, …). 113 should be 112 (56 × 2). Answer: C.
5. Pattern: Differences are 1, 4, 9, 16, 25 (squares of 1, 2, 3, 4, 5). 15 should be 15 (6 + 9 = 15). Answer: C.
6. Pattern: Differences are 4, 6, 8, 10, 12 (increase by 2). 23 should be 22 (14 + 8 = 22). Answer: C.
7. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 18 should be 20 (16 + 4 = 20). Answer: D.
8. Pattern: Prime numbers (2, 3, 5, 7, 11, 13). 8 should be 7. Answer: C.
9. Pattern: Divide by 2 (100 ÷ 2 = 50, 50 ÷ 2 = 25, 25 ÷ 2 = 12.5, 12.5 ÷ 2 = 6.25). 13 should be 12.5. Answer: C.
10. Pattern: Multiply by 3, 4, 5, 6, … (1 × 3 = 3, 3 × 4 = 12, 12 × 5 = 60, 60 × 6 = 360). 60 is correct. Answer: C.
11. Pattern: Cubes (2³, 3³, 4³, 5³, 6³, 7³). 126 should be 125 (5³). Answer: C.
12. Pattern: Differences are 3, 6, 9, 12, 15 (increase by 3). 47 should be 50 (34 + 16 = 50). Answer: D.
13. Pattern: Fibonacci (1 + 1 = 1, 1 + 1 = 2, 1 + 2 = 3, 2 + 3 = 5, 3 + 5 = 8). 6 should be 5. Answer: C.
14. Pattern: Differences are 8, 12, 16, 20, 24 (increase by 4). 41 should be 40 (24 + 16 = 40). Answer: C.
15. Pattern: Multiply by 2, 3, 4, 5, … (3 × 2 = 6, 6 × 3 = 18, 18 × 4 = 72, 72 × 5 = 360). 71 should be 72. Answer: C.
16. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 15 should be 16 (13 + 3 = 16). Answer: D.
17. Pattern: Differences are 4, 9, 16, 25, 36 (squares of 2, 3, 4, 5, 6). 31 should be 30 (14 + 16 = 30). Answer: C.
18. Pattern: Multiply by 2, 3, 4, 5, … (2 × 2 = 4, 4 × 3 = 12, 12 × 4 = 48, 48 × 5 = 240). 47 should be 48. Answer: C.
19. Pattern: Multiply by 2, 3, 4, 5, … (6 × 2 = 12, 12 × 3 = 36, 36 × 4 = 144, 144 × 5 = 720). 143 should be 144. Answer: C.
20. Pattern: Multiply by 2 + 1, 2 + 2, 2 + 3, … (1 × 2 + 1 = 2, 2 × 2 + 1 = 5, …). 24 should be 22 (11 × 2 + 0 = 22). Answer: D.
21. Pattern: Multiply by 5, 3, 2.33, … (3 × 5 = 15, 15 × 3 = 45, 45 × 2.33 = 105, 105 × 1.8 = 189). 104 should be 105. Answer: C.
22. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 14 should be 16 (11 + 3 = 16). Answer: D.
23. Pattern: Differences are 6, 12, 18, 24, 30 (multiples of 6). 39 should be 38 (20 + 18 = 38). Answer: C.
24. Pattern: Differences are 2, 3, 4, 5, 6 (increase by 1). 11 should be 10 (6 + 4 = 10). Answer: C.
25. Pattern: Differences are 20, 25, 30, 35, 40 (increase by 5). 81 should be 80 (50 + 30 = 80). Answer: C.
26. Pattern: Multiply by 2 + 2, 2 + 3, 2 + 4, … (2 × 2 + 2 = 6, 6 × 2 + 3 = 15, …). 23 should be 22 (10 × 2 + 2 = 22). Answer: C.
27. Pattern: Multiply by 2, 3, 4, 5, … (7 × 2 = 14, 14 × 3 = 42, 42 × 4 = 168, 168 × 5 = 840). 167 should be 168. Answer: C.
28. Pattern: Factorials (1!, 2!, 3!, 4!, 5!, 6!). 23 should be 24 (4!). Answer: C.
29. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 13 should be 14 (10 + 4 = 14). Answer: D.
30. Pattern: Multiply by 2, 3, 4, 5, … (10 × 2 = 20, 20 × 3 = 60, 60 × 4 = 240, 240 × 5 = 1200). 239 should be 240. Answer: C.
31. Pattern: Differences are 3, 6, 9, 12, 15 (increase by 3). 18 should be 19 (10 + 9 = 19). Answer: C.
32. Pattern: Multiply by 1 + 1, 2 + 2, 3 + 3, … (2 × 1 + 1 = 3, 3 × 2 + 4 = 10, …). 38 should be 39 (10 × 3 + 9 = 39). Answer: C.
33. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 12 should be 11 (8 + 3 = 11). Answer: C.
34. Pattern: Multiply by 5, 4, 3, 2, … (1 × 5 = 5, 5 × 4 = 20, 20 × 3 = 60, 60 × 2 = 120). 59 should be 60. Answer: C.
35. Pattern: Multiply by 4, 3, 2.5, 2.4, … (3 × 4 = 12, 12 × 3 = 36, 36 × 2.5 = 90, 90 × 2.4 = 216). 89 should be 90. Answer: C.
36. Pattern: Factorials (2!, 3!, 4!, 5!, 6!, 7!). 119 should be 120 (5!). Answer: C.
37. Pattern: Differences are 3, 6, 9, 12, 15 (multiples of 3). 23 should be 22 (13 + 9 = 22). Answer: C.
38. Pattern: Multiply by 2 + 1, 3 + 2, 4 + 3, … (1 × 2 + 1 = 3, 3 × 3 + 1 = 10, …). 34 should be 35 (10 × 3 + 5 = 35). Answer: C.
39. Pattern: Differences are 12, 18, 24, 30, 36 (multiples of 6). 61 should be 60 (36 + 24 = 60). Answer: C.
40. Pattern: Differences are 3, 4, 5, 6, 7 (increase by 1). 15 should be 14 (9 + 5 = 14). Answer: C.
41. Pattern: Differences are 6, 9, 12, 15, 18 (multiples of 3). 29 should be 30 (18 + 12 = 30). Answer: C.
42. Pattern: Multiply by 2 + 1, 2 + 2, 2 + 3, … (1 × 2 + 1 = 3, 3 × 2 + 2 = 8, …). 15 should be 16 (8 × 2 + 0 = 16). Answer: C.
43. Pattern: Multiply by 2 + 2, 2 + 4, 2 + 6, … (4 × 2 + 2 = 10, 10 × 2 + 2 = 22, …). 47 should be 46 (22 × 2 + 2 = 46). Answer: C.
44. Pattern: Differences are 5, 10, 15, 20, 25 (multiples of 5). 31 should be 32 (17 + 15 = 32). Answer: C.
45. Pattern: Differences are 10, 15, 20, 25, 30 (increase by 5). 51 should be 50 (30 + 20 = 50). Answer: C.
46. Pattern: Geometric, multiply by 4 (1 × 4 = 4, 4 × 4 = 16, 16 × 4 = 64, 64 × 4 = 256). 63 should be 64. Answer: C.
47. Pattern: Differences are 3, 6, 9, 12, 15 (multiples of 3). 22 should be 21 (12 + 9 = 21). Answer: C.
48. Pattern: Multiply by 3 + 2, 3 + 3, 3 + 4, … (2 × 3 + 2 = 8, 8 × 3 + 2 = 26, …). 79 should be 80 (26 × 3 + 2 = 80). Answer: C.
49. Pattern: Multiply by 1 + 1, 2 + 1, 3 + 1, … (7 × 1 + 1 = 8, 8 × 2 + 1 = 17, …). 42 should be 43 (16 × 3 - 5 = 43). Answer: C.
50. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 11 should be 12 (8 + 3 = 12). Answer: C.
51. Pattern: Differences are 4, 6, 8, 10, 12 (increase by 2). 20 should be 22 (14 + 8 = 22). Answer: C.
52. Pattern: Geometric, multiply by 3 (3 × 3 = 9, 9 × 3 = 27, 27 × 3 = 81, …). 82 should be 81. Answer: C.
53. Pattern: Squares (1², 2², 3², 4², 5², 6²). 15 should be 16 (4²). Answer: C.
54. Pattern: Multiply by 2 (7 × 2 = 14, 14 × 2 = 28, …). 57 should be 56 (28 × 2). Answer: C.
55. Pattern: Differences are 1, 4, 9, 16, 25 (squares of 1, 2, 3, 4, 5). 14 should be 15 (6 + 9 = 15). Answer: C.
56. Pattern: Differences are 4, 6, 8, 10, 12 (increase by 2). 22 should be 23 (14 + 9 = 23). Answer: C.
57. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 17 should be 16 (13 + 3 = 16). Answer: C.
58. Pattern: Prime numbers (2, 3, 5, 7, 11, 13). 10 should be 11. Answer: C.
59. Pattern: Divide by 2 (100 ÷ 2 = 50, 50 ÷ 2 = 25, 25 ÷ 2 = 12.5, 12.5 ÷ 2 = 6.25). 7.25 should be 6.25. Answer: C.
60. Pattern: Multiply by 3, 4, 5, 6, … (1 × 3 = 3, 3 × 4 = 12, 12 × 5 = 60, 60 × 6 = 360). 59 should be 60. Answer: C.
61. Pattern: Cubes (2³, 3³, 4³, 5³, 6³, 7³). 124 should be 125 (5³). Answer: C.
62. Pattern: Differences are 3, 6, 9, 12, 15 (increase by 3). 22 should be 20 (11 + 9 = 20). Answer: C.
63. Pattern: Fibonacci (1 + 1 = 1, 1 + 1 = 2, 1 + 2 = 3, 2 + 3 = 5, 3 + 5 = 8). 4 should be 3. Answer: C.
64. Pattern: Differences are 8, 12, 16, 20, 24 (increase by 4). 40 should be 41 (24 + 17 = 41). Answer: C.
65. Pattern: Multiply by 2, 3, 4, 5, … (3 × 2 = 6, 6 × 3 = 18, 18 × 4 = 72, 72 × 5 = 360). 70 should be 72. Answer: C.
66. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 14 should be 13 (10 + 3 = 13). Answer: C.
67. Pattern: Differences are 4, 9, 16, 25, 36 (squares of 2, 3, 4, 5, 6). 30 should be 31 (14 + 17 = 31). Answer: C.
68. Pattern: Multiply by 2, 3, 4, 5, … (2 × 2 = 4, 4 × 3 = 12, 12 × 4 = 48, 48 × 5 = 240). 239 should be 240. Answer: C.
69. Pattern: Multiply by 2, 3, 4, 5, … (6 × 2 = 12, 12 × 3 = 36, 36 × 4 = 144, 144 × 5 = 720). 719 should be 720. Answer: C.
70. Pattern: Multiply by 2 + 1, 2 + 2, 2 + 3, … (1 × 2 + 1 = 2, 2 × 2 + 1 = 5, …). 10 should be 11 (5 × 2 + 1 = 11). Answer: C.
71. Pattern: Multiply by 5, 3, 2.33, … (3 × 5 = 15, 15 × 3 = 45, 45 × 2.33 = 105, 105 × 1.8 = 189). 188 should be 189. Answer: C.
72. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 10 should be 11 (7 + 3 = 11). Answer: C.
73. Pattern: Differences are 6, 12, 18, 24, 30 (multiples of 6). 38 should be 39 (20 + 19 = 39). Answer: C.
74. Pattern: Differences are 2, 3, 4, 5, 6 (increase by 1). 10 should be 11 (6 + 5 = 11). Answer: C.
75. Pattern: Differences are 20, 25, 30, 35, 40 (increase by 5). 80 should be 81 (50 + 31 = 81). Answer: C.
76. Pattern: Multiply by 2 + 2, 2 + 3, 2 + 4, … (2 × 2 + 2 = 6, 6 × 2 + 3 = 15, …). 22 should be 23 (10 × 2 + 3 = 23). Answer: C.
77. Pattern: Multiply by 2, 3, 4, 5, … (7 × 2 = 14, 14 × 3 = 42, 42 × 4 = 168, 168 × 5 = 840). 671 should be 672. Answer: C.
78. Pattern: Factorials (1!, 2!, 3!, 4!, 5!, 6!). 119 should be 120 (5!). Answer: C.
79. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 12 should be 13 (9 + 4 = 13). Answer: C.
80. Pattern: Multiply by 2, 3, 4, 5, … (10 × 2 = 20, 20 × 3 = 60, 60 × 4 = 240, 240 × 5 = 1200). 959 should be 960. Answer: C.
81. Pattern: Differences are 3, 6, 9, 12, 15 (increase by 3). 19 should be 20 (10 + 10 = 20). Answer: C.
82. Pattern: Multiply by 1 + 1, 2 + 2, 3 + 3, … (2 × 1 + 1 = 3, 3 × 2 + 4 = 10, …). 39 should be 40 (10 × 3 + 10 = 40). Answer: C.
83. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 11 should be 12 (8 + 4 = 12). Answer: C.
84. Pattern: Multiply by 5, 4, 3, 2, … (1 × 5 = 5, 5 × 4 = 20, 20 × 3 = 60, 60 × 2 = 120). 119 should be 120. Answer: C.
85. Pattern: Multiply by 4, 3, 2.5, 2.4, … (3 × 4 = 12, 12 × 3 = 36, 36 × 2.5 = 90, 90 × 2.4 = 216). 215 should be 216. Answer: C.
86. Pattern: Factorials (2!, 3!, 4!, 5!, 6!, 7!). 719 should be 720 (6!). Answer: C.
87. Pattern: Differences are 3, 6, 9, 12, 15 (multiples of 3). 22 should be 23 (13 + 10 = 23). Answer: C.
88. Pattern: Multiply by 2 + 1, 3 + 2, 4 + 3, … (1 × 2 + 1 = 3, 3 × 3 + 1 = 10, …). 35 should be 36 (10 × 3 + 6 = 36). Answer: C.
89. Pattern: Differences are 12, 18, 24, 30, 36 (multiples of 6). 60 should be 61 (36 + 25 = 61). Answer: C.
90. Pattern: Differences are 3, 4, 5, 6, 7 (increase by 1). 14 should be 15 (9 + 6 = 15). Answer: C.
91. Pattern: Differences are 6, 9, 12, 15, 18 (multiples of 3). 30 should be 31 (18 + 13 = 31). Answer: C.
92. Pattern: Multiply by 2 + 1, 2 + 2, 2 + 3, … (1 × 2 + 1 = 3, 3 × 2 + 2 = 8, …). 16 should be 17 (8 × 2 + 1 = 17). Answer: C.
93. Pattern: Multiply by 2 + 2, 2 + 4, 2 + 6, … (4 × 2 + 2 = 10, 10 × 2 + 2 = 22, …). 46 should be 47 (22 × 2 + 3 = 47). Answer: C.
94. Pattern: Differences are 5, 10, 15, 20, 25 (multiples of 5). 32 should be 33 (17 + 16 = 33). Answer: C.
95. Pattern: Differences are 10, 15, 20, 25, 30 (increase by 5). 50 should be 51 (30 + 21 = 51). Answer: C.
96. Pattern: Geometric, multiply by 4 (1 × 4 = 4, 4 × 4 = 16, 16 × 4 = 64, 64 × 4 = 256). 255 should be 256. Answer: C.
97. Pattern: Differences are 3, 6, 9, 12, 15 (multiples of 3). 21 should be 22 (12 + 10 = 22). Answer: C.
98. Pattern: Multiply by 3 + 2, 3 + 3, 3 + 4, … (2 × 3 + 2 = 8, 8 × 3 + 2 = 26, …). 241 should be 242 (80 × 3 + 2 = 242). Answer: C.
99. Pattern: Multiply by 1 + 1, 2 + 1, 3 + 1, … (7 × 1 + 1 = 8, 8 × 2 + 1 = 17, …). 43 should be 44 (16 × 3 - 4 = 44). Answer: C.
100. Pattern: Differences are 1, 2, 3, 4, 5 (increase by 1). 10 should be 11 (8 + 3 = 11). Answer: C.
