Quantitative Aptitude: Number Series Set 111

Directions(1-10): Find the missing term '?' of the following number series.

1. 495, 485, 465, 425, 345, ?
   177
   185
   162
   195
   174
   Option B
   495 - 1 × 10 = 485
   485 - 2 × 10 = 465
   465 - 4 × 10 = 425
   425 - 8 × 10 = 345
   345 - 16 × 10 = 185
   
   
    



2. 16, 22, 33, 49, 70, ?
   88
   80
   96
   90
   100
   Option C
   16 + 6 = 22
   22 + 11 = 33
   33 + 16 = 49
   49 + 21 = 70
   70 + 26 = 96
   
   
    



3. 32, 36, 52, 88, 152, ?
   200
   220
   235
   252
   260
   Option D
   32 + 2^2 = 36
   36 + 4^2 = 52
   52 + 6^2 = 88
   88 + 8^2 = 152
   152 + 10^2 = 252
   
   
    



4. 17, 289, 425, 493, 527, ?
   520
   544
   500
   515
   530
   Option B
   17 + 272 = 289
   289 + 136 = 425
   425 + 68 = 493
   493 + 34 = 527
   527 + 17 = 544
   
   
    



5. 13, 27, 55, 97, 153, ?
   223
   200
   215
   220
   234
   Option A
   13 + 1 × 14 = 27
   27 + 2 × 14 = 55
   55 + 3 × 14 = 97
   97 + 4 × 14 = 153
   153 + 5 × 14 = 223
   
   
    



6. 50, 60, 75, 97.5, ?, 184.275, 267.19875
   192.173
   131.625
   120.153
   138.738
   153.153
   Option B
   50 × 1.2 = 60
   60 × 1.25 = 75
   75 × 1.3 = 97.5
   97.5 × 1.35 = 131.625
   131.625 × 1.4 = 184.275
   
   
    



7. 12, 15, 36, ?, 480, 2415, 14508
   100
   120
   105
   114
   117
   Option E
   12 × 1 + 3 × 1 = 15
   15 × 2 + 3 × 2 = 36
   36 × 3 + 3 × 3 = 117
   117 × 4 + 3 × 4 = 480
   480 × 5 + 3 × 5 = 2415
   
   
    



8. 1, 2, 6, 21, 88, 445, ?
   2250
   2212
   2676
   2020
   2132
   Option C
   1 × 1 + 1 = 2
   2 × 2 + 2 = 6
   6 × 3 + 3 = 21
   21 × 4 + 4 = 88
   88 × 5 + 5 = 445
   445 × 6 + 6 = 2676
   
   
    



9. 20, 21, 25, 34, 50, ?, 111
   66
   60
   75
   81
   92
   Option C
   20 + 1^2 = 21
   21 + 2^2 = 25
   25 + 3^2 = 34
   34 + 4^2 = 50
   50 + 5^2 = 75
   
   
    



10. 11, 15, 31, 67, 131,?
    212
    220
    222
    231
    225
    Option D
    11 + 2^2 = 11 + 4 = 15
    15 + 4^2 = 15 + 16 = 31
    31 + 6^2 = 31 + 36 = 67
    67 + 8^2 = 67 + 64 = 131
    131 + 10^2 = 131 + 100 = 231