Quantitative Aptitude: Number Series Set 144

  1. Study the following and answer the questions;

    18 , 119 , 708 , ? , 14136 , 42405

    2540
    2500
    3535
    3450
    None of these
    Option C
    18*7-7=119
    119*6-6=708
    708*5-5=3535

     

  2. 5 , 7.5 , 11.25 , 17.5 , ? , 50
    27.50
    28.75
    25.50
    24.75
    None of these
    Option B
    7.5-5=2.5
    11.25-7.5=3.75
    =3.75-2.5=1.25

     

  3. 15 , 29 , 47 , 73 , 115 , ?
    185
    170
    165
    189
    None of these
    Option D
    15*2-1=29
    29*2-11=47
    47*2-21=73

     

  4. 5 , 7 , 10 , 36 , 136 , ?
    690
    685
    680
    705
    700
    Option A
    5*1+2=7
    7*2-4=10
    10*3+6=36

     

  5. 5 , 8 , 6 ,? , 7 , 12
    10
    11
    10.75
    9
    None of these
    Option A
    5*2-2=8
    8/2 + 2 =6
    6*2-2=10

     

  6. 8 , 10 , 14.5 , 22.5 , 35 , 53 , ?
    80.00
    77.50
    69.50
    65
    None of these
    Option B
    10-8=2
    14.5-10=4.5
    22.5-14.5=8

     

  7. Study the following and find the wrong number:

    21 , 22 , 28 , 38 , 55 , 81 , 118

    21
    22
    38
    55
    118
    Option B
    21+1^2+1=23
    23+2^2+1=28
    28+3^2+1=38

     

  8. 90720 , 10080 , 1440 , 240 , 48 , 10 , 4
    4
    10
    10080
    240
    None of these
    Option B
    4*3=12
    12*4=48
    48*5=240

     

  9. 3 , 7 , 6 , 28 , 38 , 112 , 448
    38
    3
    448
    7
    28
    Option A
    First series- 3 , 6 , 9 (+3)
    Second ne- 7 , 28 , 112 , 448 (multiplied by 4)

     

  10. 4088 , 2394 , 1290 , 520 , 252 , 78 , 14
    520
    252
    78
    14
    4088
    Option A
    7^4-6
    6^4-6
    5^4-5

     


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