Quantitative Aptitude: Number Series Set 97

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

  1. 50, 60, 75, 97.5, ?, 184.275, 267.19875
    124.124
    102.110
    131.625
    130.124
    125.125
    Option C
    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

     

  2. 17, 9, ?, 16.5, 35, 90
    8
    4
    10
    7
    6
    Option C
    (×0.5 + 0.5), (×1 + 1), (×1.5 + 1.5), (×2 + 2)
    = 9 × 1 + 1 = 10

     

  3. 6, 13, 38, ?, 532, 2675
    555
    532
    520
    500
    545
    Option B
    6 × 1 + 1 × 7 = 13
    13 × 2 + 2 × 6 = 38
    38 × 3 + 3 × 5 = 129
    129 × 4 + 4 × 4 = 532

     

  4. 3, 22, ?, 673, 2696, 8093
    120
    129
    125
    130
    134
    Option E
    ×7 + 1, ×6 + 2, ×5 + 3, ×4 + 4, ×3 + 5….
    = 22 × 6 + 2 = 134

     

  5. 17, 52, 158, 477, ?, 4310
    1245
    1223
    1330
    1435
    1254
    Option D
    ×3 + 1, ×3 + 2, ×3 + 3…
    = 477 × 3 + 4
    = 1431 + 4 = 1435

     

  6. 286 ,142, ?, 34, 16, 7
    60
    65
    78
    70
    68
    Option D
    (/ 2 – 1), (/ 2 – 1), (/2 – 1)…
    142/2 – 1 = 71 –1 = 70

     

  7. 12, 15 , 36, ?, 480, 2415, 14508
    100
    110
    125
    117
    120
    Option D
    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, ?
    2002
    2250
    2345
    2676
    2400
    Option D
    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
    88
    90
    62
    60
    75
    Option E
    20 + 1^2 = 21
    21 + 2^2 = 25
    25 + 3^2 = 34
    34 + 4^2 = 50
    50 + 5^2 = 75

     

  10. 600, 125, 30, ?, 7.2, 6.44, 6.288
    10
    11
    8
    9
    6
    Option B
    600 /5 + 5 = 125
    125 /5 + 5 = 30
    𝟑𝟎/ 𝟓 + 5 = 11
    11/ 5 + 5 = 7.2

     


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