Quantitative Aptitude: Number Series Set 4

Directions: The following series are based on a specific pattern. In these series one number is wrong, find that odd one

1. 5, 9, 18, 38, 55, 85, 124
   A) 18
   B) 38
   C) 9
   D) 85
   E) 55
   
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   Option B
   Pattern:
   2³ – 1², 3³ – 2², 4³ – 3², 5³ – 4², ….
   
2. 9, 26, 65, 124, 217, 338, 513
   A) 124
   B) 65
   C) 338
   D) 26
   E) 217
   
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   Option C
   Pattern:
   2³ + 1, 3³ – 1, 4³ + 1, 5³ – 1, 6³ + 1, 7³ – 1,
3. 9, 18, 40, 83, 170, 345, 696
   A) 18
   B) 345
   C) 40
   D) 83
   E) 170
   
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   Option A
   Pattern:
   ×2 + 1, ×2 + 2, ×2 + 3, ×2 + 4, ×2 + 5, ×2 + 6,
4. 512, 266, 132, 70, 40, 26, 20
   A) 40
   B) 26
   C) 132
   D) 266
   E) 70
   
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   Option D
   Pattern:
   ÷2 + 2, ÷2 + 3, ÷2 + 4, ÷2 + 5, ÷2 + 6,
5. 8, 29, 82, 241, 748, 2249, 6742
   A) 2249
   B) 82
   C) 29
   D) 748
   E) 241
   
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   Option E
   Pattern:
   ×3 + 5, ×3 – 5, ×3 + 5, ×3 – 5, ×3 + 5, ×3 – 5,..
   
6. 123, 126, 120, 144, 63, 306
   A) 126
   B) 63
   C) 144
   D) 120
   E) 306
   
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   Option C
   Pattern:
   + 3, – 3², + 3³, – 3⁴
   
7. 5, 6, 14, 27, 87, 112, 328
   A) 96
   B) 287
   C) 6
   D) 112
   E) 14
   
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   Option B
   Pattern:
   + 1², + 2³, + 3², + 4³, + 5², + 6³
   
8. 11, 31, 9, 38, 7, 35, 5
   A) 31
   B) 7
   C) 9
   D) 38
   E) 35
   
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   Option D
   Pattern:
   +20, -22, +24, -26, +28, -30
   
9. 18, 30, 14, 34, 10, 40, 6
   A) 34
   B) 30
   C) 14
   D) 10
   E) 40
   
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   Option E
   Pattern:
   +12, -16, +20, -24, +28, -32
10. 8, 10, 6, 15, 52.5, 236.25
    A) 52.5
    B) 15
    C) 10
    D) 6
    E) 236.25
    
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    Option C
    Pattern:
    × 0.5, × 1.5, × 2.5, × 3.5, ×4.5