Number Series


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

  1. 8, 11, 17, 47, 128, 371, 1100











  1. View Hint View Answer Discuss in Forum

    The series is x 3 - 13

    Correct Option: C

    The series is x 3 - 13


  1. 1, 5, 13, 31, 61, 125, 253











  1. View Hint View Answer Discuss in Forum

    The series is + 22, + 23, + 24, + 25, + 26, + 27

    Correct Option: C

    The series is + 22, + 23, + 24, + 25, + 26, + 27



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

  1. 9, 62, ?, 1854, 7415, 22244











  1. View Hint View Answer Discuss in Forum

    The series is x 7 - 1, x 6 -1, x 5 - 1, x 4 - 1, x 3 - 1

    Correct Option: D

    The series is x 7 - 1, x 6 -1, x 5 - 1, x 4 - 1, x 3 - 1


  1. 4, 8, 24, 60, ?, 224











  1. View Hint View Answer Discuss in Forum

    The series is + 22, + 42, + 62, + 82, + 102

    Correct Option: E

    The series is + 22, + 42, + 62, + 82, + 102



  1. 8000, 1600, 320, 64, 12.8?











  1. View Hint View Answer Discuss in Forum

    The series is ÷ 5.

    Correct Option: A

    The series is ÷ 5.