Quantitative Aptitude: Number Series Set 64

Directions: The following series are based on a certain pattern. One of the number in series is wrong. Find that odd one out.

  1. 11, 5, 4, 4.5, 7, 16, 42
    5
    4
    4.5
    7
    16
    Option E
    Solution: *0.5 – 0.5, * 1 – 1, *1.5 – 1.5, *2 – 2, *2.5 – 2.5, *3 – 3

     

  2. 5, 9, 27, 57, 121, 225, 379
    9
    27
    57
    121
    225
    Option B
    Solution:
    5……..9………23……..57……….121……..225………379
    ….4……..14………34……….64………104……..154
    …….+10……..+20………+30………+40……….+50

     

  3. 8, 7, 16, 45, 181, 915, 5496
    7
    16
    45
    181
    915
    Option D
    Solution: *1 – 1, *2 + 2, *3 – 3, *4 + 4, *5 – 5, *6 + 6

     

  4. 34, 71, 97, 110, 124, 129, 131
    71
    97
    110
    124
    129
    Option C
    Solution: + (62+1), + (52+1), + (42+1), + (32+1), +(22+1), + (12+1)

     

  5. 11, 12, 26, 71, 328, 1645, 9876
    12
    26
    71
    328
    1645
    Option C
    Solution: *1 + 1, *2 + 2, *3 + 3, *4 + 4, *5 + 5, *6 + 6

     

  6. 14, 8, 9, 17, 30, 76, 229
    8
    9
    17
    30
    76
    Option C
    Solution: *0.5 + 1, *1 + 1, *1.5 + 1, *2 + 1, *2.5 + 1, *3 + 1

     

  7. 125, 129, 121, 137, 105, 149, 41
    129
    121
    137
    105
    149
    Option E
    Solution: +4, -8, +16, -32, +64, -128

     

  8. 13, 15, 18, 27, 43, 75, 139
    15
    18
    27
    43
    75
    Option B
    Solution: +21, +22, +23, +24, +25, +26

     

  9. 4, 6, 9, 31, 124, 601, 3599
    6
    9
    31
    124
    601
    Option D
    Solution: *1+2, *2-3, *3+4, *4-5, *5+6, *6-7

     

  10. 6, 13, 27, 55, 111, 229, 447
    13
    27
    55
    111
    229
    Option E
    Solution: *2 + 1, *2 + 1, *2 + 1, *2 + 1, *2 + 1, *2 + 1

     



 

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4 Thoughts to “Quantitative Aptitude: Number Series Set 64”

  1. nirooba tg

    mam how can we find easily wrong number series?? please explain

    1. 1st and last numbers given are correct. So proceed the same way as we find the last number in series.
      General patterns are squares, doubles, multiply, half, addition. So try to observe which pattern could be used there and apply

      1. nirooba tg

        got it..thank u so much

  2. the walking dead

    10-10:)

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