Odd Man Out and Series


  1. 4 - 8, 16 - 32, 64 - (...) :
    1. 128
    2. -128
    3. 192
    4. -192

  1. View Hint View Answer Discuss in Forum

    Each number is the preceding number multiplied by - 2. So, the required number is - 128.

    Correct Option: B

    Each number is the preceding number multiplied by - 2. So, the required number is - 128.


  1. 125, 123, 120, 115, 108, 100, 84 ?
    1. 125
    2. 115
    3. 100
    4. 84

  1. View Hint View Answer Discuss in Forum

    Prime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be (108 - 11) i.e., 97.

    Correct Option: C

    Prime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be (108 - 11) i.e., 97.



  1. 125, 127, 130, 135, 142, 153, 165 ?
    1. 130
    2. 142
    3. 153
    4. 165

  1. View Hint View Answer Discuss in Forum

    Prime number 2, 3, 5, 7, 11, 13 are to be added successively. So, 165 is wrong.

    Correct Option: D

    Prime number 2, 3, 5, 7, 11, 13 are to be added successively. So, 165 is wrong.


  1. 52, 51, 48, 43, 34, 27, 16 ?
    1. 27
    2. 34
    3. 43
    4. 48

  1. View Hint View Answer Discuss in Forum

    Subtract 1, 3, 5, 7, 9, 11 from successive numbers. So, 34 is wrong.

    Correct Option: B

    Subtract 1, 3, 5, 7, 9, 11 from successive numbers. So, 34 is wrong.



  1. Find the wrong number in the series 3, 8, 15, 24, 34, 48, 63 ?
    1. 15
    2. 24
    3. 34
    4. 48

  1. View Hint View Answer Discuss in Forum

    The difference between consecutive terms are respectively. 5, 7, 9, 11 and 13. So, 34 is a wrong number.

    Correct Option: C

    The difference between consecutive terms are respectively. 5, 7, 9, 11 and 13. So, 34 is a wrong number.