Quantitative Aptitude: Number Series Set 22

Odd Man Out Number Series Quant for SBI PO, IBPS PO, NIACL, NICL, LIC, Dena Bank PO PGDBF, BOI, Bank of Baroda and other competitive exams

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

1. 12, 36, 48, 132, 218, 492, 912
   A) 35
   B) 48
   C) 132
   D) 218
   E) 492
   
   View Answer

   Option D
   Pattern:
   12×2 + 12 = 36
   36×2 – 24 = 48
   48×2 + 36 = 132
   132×2 – 48 = 216
   216×2 + 60 = 492
   492×2 – 72 = 912
2. 1148, 586, 304, 162, 90, 62, 33.5
   A) 586
   B) 304
   C) 162
   D) 90
   E) 62
   
   View Answer

   Option E
   Pattern:
   1148÷2 + 12 = 586
   586÷2 + 11 = 304
   304÷2 + 10 = 162
   162÷2 + 9 = 90
   90÷2 + 8 = 53
   53÷2 + 7 = 912
   
3. 26, 50, 148, 516, 2164, 10920, 65664
   A) 50
   B) 148
   C) 516
   D) 2164
   E) 10920
   
   View Answer

   Option D
   Pattern:
   26×1 + 24×1 = 50
   50×2 + 24×2 = 148
   148×3 + 24×3 = 516
   516×4 + 24×4  = 2160
   2160×5 + 24×5  = 10920
   10920×6 + 24×6  = 65664
4. 444, 220, 112, 52, 24, 10, 3
   A) 220
   B) 112
   C) 52
   D) 24
   E) 10
   
   View Answer

   Option B
   Pattern:
   (444-4) ÷ 2 = 220
   (220-4) ÷ 2 = 108
   (108-4) ÷ 2 = 52
   (52-4) ÷ 2 = 24
   (24-4) ÷ 2 = 10
   (10-4) ÷ 2 = 3  
5. 42, 60, 96, 156, 222, 312, 420
   A) 33
   B) 96
   C) 156
   D) 222
   E) 312
   
   View Answer

   Option C
   Pattern:
   +18, + 18*2, + 18*3, + 18*4, + 18*5, + 18*6
6. 14, 9, 12, 28, 121, 942, 15079
   A) 9
   B) 12
   C) 28
   D) 121
   E) 942
   
   View Answer

   Option D
   Pattern:
   14×0.5 + 2 = 9
   9×1 + 3 = 12
   12×2 + 4 = 928
   28×4 + 5 = 117
   117×8 + 6 = 942
   942×16 + 7 = 15079
7. 12, 24, 41, 68, 105, 172, 259
   A) 23
   B) 41
   C) 68
   D) 105
   E) 172
   
   View Answer

   Option D
   Pattern:
   12…….24……..41…….68…….110……172……259
   ….+12……+17…..+27……+42…….+62…..+87
   ……….+5……+10……+15……+20……+25
8. 9, 16, 27, 50, 77, 124, 191
   A) 16
   B) 27
   C) 50
   D) 77
   E) 124
   
   View Answer

   Option C
   Pattern:
   9…….16……..27…….46…….77……124……191
   …+7……+11…….+19….+31……+47…..+67
   ……+4……..+8……+12……+16….+20
   
9. 9, 21, 45, 94, 189, 381, 765
   A) 21
   B) 45
   C) 94
   D) 189
   E) 381
   
   View Answer

   Option C
   Pattern:
   9×2 + 3 = 21
   21×2 + 3 = 45
   45×2 + 3 = 93
   93×2 + 3 = 189
   189×2 + 3 = 381
   381×2 + 3 = 765  
10. 8, 10, 36, 73, 297, 1491, 8953
    A) 10
    B) 36
    C) 73
    D) 297
    E) 1491
    
    View Answer

    Option B
    Pattern:
    8×1 + 2 = 10,
    10×2 + 3 = 23,
    23×3 + 4 = 73,
    73×4 + 5 = 297,
    297×5 + 6 = 1491,
    1491×6 + 7 = 8953   

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