Number Series


Direction: In the following number series only one number is wrong. Find out the wrong number.

  1. 1, 3, 10, 21, 64, 129, 356, 777
    1. 21
    2. 129
    3. 10
    4. 356
    5. none of these

  1. View Hint View Answer Discuss in Forum

    Pattern is x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1, ........

    Correct Option: D

    Pattern is x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1, ........


  1. 3, 4, 10, 32, 136, 685, 4116
    1. 10
    2. 32
    3. 136
    4. 4116
    5. All are correct

  1. View Hint View Answer Discuss in Forum

    Pattern is : x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4, ............

    Correct Option: B

    Pattern is : x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4, ............



  1. 380, 188, 92, 48, 20, 8, 2
    1. 8
    2. 20
    3. 48
    4. 188
    5. None of these

  1. View Hint View Answer Discuss in Forum

    Pattern is : - 192, - 96, - 48, - 24, -12, - 6

    Correct Option: C

    Pattern is : - 192, - 96, - 48, - 24, -12, - 6


  1. 4, 10, 22, 46, 96, 190, 382
    1. 4
    2. 10
    3. 96
    4. 382
    5. None of these

  1. View Hint View Answer Discuss in Forum

    Pattern is : + 6, + 12, + 24, + 48, +96, + 192

    Correct Option: C

    Pattern is : + 6, + 12, + 24, + 48, +96, + 192



  1. 2, 3, 4, 4, 6, 8, 9, 12, 16
    1. 3
    2. 6
    3. 9
    4. 12
    5. none of these

  1. View Hint View Answer Discuss in Forum

    Pattern is : the series is the combination of three series -each term is twice the preceding term.
    (i) 1st, 4st, 7st term i. e 2,4,9,.......
    (ii) 2st, 5st, 8st term i, e 3,6,12.....
    (iii) 3st, 6st, 9st 4,8,16......
    So, 9 is wrong.

    Correct Option: C

    Pattern is : the series is the combination of three series -each term is twice the preceding term.
    (i) 1st, 4st, 7st term i. e 2,4,9,.......
    (ii) 2st, 5st, 8st term i, e 3,6,12.....
    (iii) 3st, 6st, 9st 4,8,16......
    So, 9 is wrong.