Number Series


Direction: What should come in place of question mark (?) in the following number series?

  1. 12, 15, 19, 24, ?
    1. 28
    2. 27
    3. 30
    4. 32
    5. 34

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    The difference between the numbers increases by 1.

    Correct Option: C

    The difference between the numbers increases by 1.


  1. 72, 63, 54, 45, ...?......
    1. 36
    2. 81
    3. 27
    4. 90
    5. 18

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    The gap is of -9

    Correct Option: A

    The gap is of -9



  1. 8, 64, 216, 516, 512, 1000, 1728, ?
    1. 4096
    2. 2744
    3. 3375
    4. 2197
    5. 4913

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    Series is 23 , 43 , 63 , 83 , 103 , 123 , ....
    Then, ? = 143 = 2744

    Correct Option: B

    Series is 23 , 43 , 63 , 83 , 103 , 123 , ....
    Then, ? = 143 = 2744


  1. 81, 512, 2401, 7776, 15625, 16384, ?
    1. 2187
    2. 19683
    3. 729
    4. 512
    5. 6561

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    Option (e) Series is 92 , 83 , 74 , 65 , 56 , 47 , 38
    ? = 38 , = 6561

    Correct Option: E

    Option (e) Series is 92 , 83 , 74 , 65 , 56 , 47 , 38
    ? = 38 , = 6561



  1. 6, 26, 134, 666, 3334, 16666, ?
    1. 84344
    2. 83443
    3. 84434
    4. 83334
    5. 83344

  1. View Hint View Answer Discuss in Forum

    6 x 5 -4 = 26
    26 x 5 + 4 =134
    134 x 5 - 4 =666
    666 x 5 + 4 = 3334
    3334 x 5 -4 = 16666
    16666 x 5 + 4 = ?
    ? = 83334

    Correct Option: D

    6 x 5 -4 = 26
    26 x 5 + 4 =134
    134 x 5 - 4 =666
    666 x 5 + 4 = 3334
    3334 x 5 -4 = 16666
    16666 x 5 + 4 = ?
    ? = 83334