Number System


  1. A number is as much greater than 31 is less than 55. The number is ?









  1. View Hint View Answer Discuss in Forum

    Let the number be x.
    Then, x - 31 = 55 - x

    Correct Option: D

    Let the number be x.
    Then, x - 31 = 55 - x
    ⇒ 2x = 55 + 31= 86
    ⇒ 2x = 86
    ∴ x = 43


  1. 1/4 of a number subtracted from 1/3 of the same number gives 12. The number is ?









  1. View Hint View Answer Discuss in Forum

    Let the required number is N.
    Then, N/3 - N/4 = 12.

    Correct Option: A

    Let the required number is N.
    Then, N/3 - N/4 = 12.
    ⇒ 4N - 3N = 144
    ∴ N = 144



  1. 3/4 of a number is 19 less than the original number. The number is ?









  1. View Hint View Answer Discuss in Forum

    Let the original number be N.
    So from question N - 3N/4 = 19

    Correct Option: C

    Let the original number be N.
    So from question N - 3N/4 = 19
    ⇒ 4N - 3N = 76
    ∴ N = 76


  1. If one-fifth of a number decreased by 5 is 5, then the number is ?









  1. View Hint View Answer Discuss in Forum

    Let the number be N.
    Then, N/5 - 5 = 5

    Correct Option: B

    Let the number be N.
    Then, N/5 - 5 = 5
    ⇒ N - 25 = 25
    ∴ N = 50



  1. A number is 25 more than its two-fifth. The number is ?









  1. View Hint View Answer Discuss in Forum

    Let the number be N.
    So from question 2N/5 + 25 = N

    Correct Option: C

    Let the number be N.
    So from question 2N/5 + 25 = N
    ⇒ 2N + 125 = 5N
    ⇒ 3N = 125
    ∴ N = 125/3