Square root and cube root


  1. 4/3 - √3/4 = ?
    1. 1/2√3
    2. - 1/2√3
    3. 1
    4. 2√3

  1. View Hint View Answer Discuss in Forum

    4/√3 - √3/√4
    = 2/√3 - √3/2
    = (4 - 3)/2√3
    = 1/2√3

    Correct Option: A

    4/√3 - √3/√4
    = 2/√3 - √3/2
    = (4 - 3)/2√3
    = 1/2√3


  1. If √2 = 1.4142, then the approximate value of 1/√2/9 is ?
    1. 0.2321
    2. 0.4714
    3. 0.3174
    4. 0.4174

  1. View Hint View Answer Discuss in Forum

    2/9
    = √2/√9
    = √2/3
    = 1.4142/3

    Correct Option: B

    2/9
    = √2/√9
    = √2/3
    = 1.4142/3

    ∴ 1/√2/9 = 0.4714



  1. If √3 = 1.732, then the approximate value of 1/√3 is ?
    1. 0.617
    2. 0.313
    3. 0.577
    4. 0.173

  1. View Hint View Answer Discuss in Forum

    1/√3 = 1/√3 x (√3 / √3)
    = √3/3
    = 1.732 / 3

    Correct Option: C

    1/√3 = 1/√3 x (√3 / √3)
    = √3/3
    = 1.732 / 3
    = 0.577


  1. If √24 = 4.899, then the value of √8/3 is ?
    1. 0.544
    2. 2.666
    3. 1.633
    4. 1.333

  1. View Hint View Answer Discuss in Forum

    8/3 =√24/9
    = √24/3

    Correct Option: C

    8/3 =√24/9
    = √24/3
    = 4.899/3
    =1.633



  1. ? / √2.25 = 550
    1. 825
    2. 82.5
    3. 3666.66
    4. 2

  1. View Hint View Answer Discuss in Forum

    Let x/ √2.25
    = 550.

    Then, x/1.5 = 550
    ∴ x = (550 x 1.5)
    = (550 x 15/10) = 825

    Correct Option: A

    Let N / √2.25 = 550.
    Then, N / 1.5 = 550
    ∴ N = (550 x 1.5)
    = (550 x 15) /10
    = 825