Quantitative Aptitude: Number Series Set 100

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

1. 17, 9, ?, 16.5, 35, 90
   12
   14
   17
   10
   18
   Option D
   (×0.5 + 0.5), (×1 + 1), (×1.5 + 1.5), (×2 + 2)
   9 × 1 + 1 = 10
   
   
    



2. 286 ,142, ?, 34, 16, 7
   78
   89
   81
   77
   70
   Option E
   ( 2 – 1), ( 2 – 1),..
   142/2 – 1 = 71 –1 = 70
   
   
    



3. 3, 22, ?, 673, 2696, 8093
   110
   134
   125
   156
   167
   Option B
   ×7 + 1, ×6 + 2, ×5 + 3, ×4 + 4, ×3 + 5
   22 × 6 + 2 = 134
   
   
    



4. 6, 13, 38, ?, 532, 2675
   112
   140
   129
   133
   156
   Option C
   6 × 1 + 1 × 7 = 13
   13 × 2 + 2 × 6 = 38
   38 × 3 + 3 × 5 = 129
   129 × 4 + 4 × 4 = 532
   
   
    



5. 20, 21, 25, 34, 50, ?, 111
   80
   66
   70
   75
   89
   Option D
   20 + 1^2 = 21
   21 + 2^2 = 25
   25 + 3^2 = 34
   34 + 4^2 = 50
   50 + 5^2 = 75
   
   
    



6. 1, 2, 6, 21, 88, 445, ?
   2552
   2200
   2676
   2560
   2525
   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
   
   
    



7. 17, 52, 158, 477, ?, 4310
   1441
   1450
   1556
   1435
   1670
   Option D
   ×3 + 1, ×3 + 2, ×3 + 3
   477 × 3 + 4 = 1431 + 4 = 1435
   
   
    



8. 12, 15 , 36, ?, 480, 2415, 14508
   100
   117
   120
   145
   132
   Option B
   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
   
   
    



9. 600, 125, 30, ?, 7.2, 6.44, 6.288
   15
   20
   25
   11
   36
   Option D
   600/5 + 5 = 125
   125/5 + 5 = 30
   𝟑𝟎/𝟓 + 5 = 11
   11/ 5 + 5 = 7.2
   
   
    



10. 50, 60, 75, 97.5, ?, 184.275, 267.19875
    113.324
    131.625
    125.520
    100.616
    110.132
    Option B
    50 × 1.20 = 60
    60 × 1.25 = 75
    75 × 1.30 = 97.5
    97.5 × 1.35 = 131.625
    131.625 × 1.40 = 184.275