Quantitative Aptitude: Number Series Set 133

Directions: The following number series are based on a certain pattern. One number out of all is incorrect and does not follow the pattern. Find that odd one out.

  1. 1000, 995, 999,9 80, 950, 830
    1000
    995
    999
    980
    950
    Option C
    1000 .. 995 .. 990 .. 980 .. 950 830

    – 5 .. 5 .. 10 .. 30 .. 120

    ….x 1 .. 2 .. 3 .. 4

     

  2. 20, 25, 31.1, 38.4, 40, 57
    20
    25
    40
    57
    31.1
    Option C
    20 …. 25 …. 31.1 …. 38.4 …. 47 …. 57

    ……+ 5 …. 6.1 …. 7.3 …. 8.6 …… 10

    ………. + 1.1 …. 1.2 …. 1.3…. 1.4

     

  3. 200, 184,164, 135, 90, 40
    200
    184
    164
    90
    20
    Option E
    200 184 164 135 90 20

    – 16 20 29 45 70

    + 2^2 3^2 4^2 5^2

     

  4. 1, 1, 5, 70, 2000, 115500
    1
    5
    70
    2000
    115500
    Option D
    1 1 5 70 2100 115500

    x 1 5 14 30 55

    + 2^2 3^2 4^2 5^2

     

  5. 15, 25, 36, 52, 70, 115
    15
    25
    36
    52
    70
    Option E
    15 25 36 52 77 115

    + 10 11 16 25 38

    + 1 5 9 13

     

  6. 30, 31, 36, 41, 56, 87
    30
    31
    36
    41
    56
    Option C
    30 31 34 41 56 87

    + 1 3 7 15 31

    + 2^1 2^2 2^3 2^4

     

  7. 300, 245 , 190, 160, 150, 175
    300
    245
    190
    160
    150
    Option C
    300 245 195 160 150 175

    – 55 50 35 10 -25

    -5 15 25 35

     

  8. 10, 13, 21, 47, 84, 155
    10
    13
    21
    47
    84
    Option D
    10 13 21 42 84 155

    + 3 8 21 42 71

    + 5 13 21 29

    + 8 8 8

     

  9. 20, 24.5, 30.5, 39.5, 53.5 , 72.5
    53
    20
    30.5
    24.5
    39.5
    Option A
    20 24.5 30.5 39.5 53 72.5

    + 4.5 6 9 13.5 19.5

    +1. 5 3 4.5 6

    + 1.5 1.5 1.5

     

  10. 14, 34, 64 , 124, 262
    14
    34
    64
    124
    262
    Option D
    + 14 34 64 122 262

    + 20 3 0 58 140

    + 1+3^2 1+3^3 1+3^4

     

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