Quantitative Aptitude: Number Series Set 131

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. 33 …..44….88…121…379….594
    33
    44
    88
    121
    379
    Option E
    379 is not a multiple of 11.

     

  2. 12…36…54…18…27….10…
    12
    36
    54
    10
    27
    Option D
    The terms are alternatively multiplied by 1.5 and divided by 3. So

     

  3. 588….565…582…605….588….611…634
    565
    605
    611
    634
    582
    Option D
    Alternatively 23 is added and 17 is subtracted

     

  4. 3840 384 48 24 2 1
    3840
    384
    48
    24
    2
    Option D
    Terms are successively divided by 10, 8, 6…

     

  5. 1…7…37….167…937..
    1
    7
    37
    167
    937
    Option D
    Series is: * 5 + 2

     

  6. 3….10….9…42….148
    3
    10
    9
    42
    148
    Option E
    The series is × 1 + 7; × 2 – 11; ×3 + 15 ; ×4 – 19 and so on.

     

  7. 145…258…381…514…658
    145
    258
    381
    514
    658
    Option E
    The series is 112 + 1; 122+ 1; 132 + 1; 142 + 1 … and so on.

     

  8. 62 …124….246…496…992
    62
    124
    246
    496
    992
    Option C
    Add the sum of digits of the number to the number itself for obtaining the next new number.

     

  9. -10 … 3… 29…121… 524
    -10
    3
    29
    121
    524
    Option D
    The Series is ×1+13; ×2+23; ×3+33; .. and so on. Here 2536 should be replaced by 2526.

     

  10. 272… 130…60…26…12
    272
    130
    60
    26
    12
    Option E
    The series is ÷2 – 6; ÷2 – 5; ÷2 – 4 .. and so on.

     

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