Square root and cube root


  1. Find the cube root of 19683.









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    In 19683, 19 lies between 23 and 33, so left digit is 2 and 683 ends with 3, so right digit is 7.

    Correct Option: D

    In 19683, 19 lies between 23 and 33, so left digit is 2 and 683 ends with 3, so right digit is 7.
    thus 27 is a cube root of 19683.


  1. If √y/169 = 54/39, then y is equal to ?









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    y/169= 54/39
    ⇒ y/169 = (54/39) x (54/39)

    Correct Option: B

    y/169= 54/39
    ⇒ y/169 = (54/39) x (54/39)
    ∴ y= (54/39) x (54/39) x 169 = 324



  1. 112/√196 x √579/12 x √256/8 = ?









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    Given Expression 112/√196 x √579/12 x √256/8
    =(112/14) x (24/12) x (16/8)

    Correct Option: D

    Given Expression 112/√196 x √579/12 x √256/8
    =(112/14) x (24/12) x (16/8)
    = 32


  1. Given that √4096 = 64, the value of √4096 + √40.96 + √.004096 is ?









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    4096 + √40.96 + √.004096
    = √4096 + √4096/100 + √4096/1000000
    =√4096 + √4096/10 + √4096/1000

    Correct Option: B

    4096 + √40.96 + √.004096
    = √4096 + √4096/100 + √4096/1000000
    =√4096 + √4096/10 + √4096/1000
    = 64 + 64/10 + 64/1000
    = 70.464



  1. .04









  1. View Hint View Answer Discuss in Forum

    .04 = √4/100

    Correct Option: B

    .04 = √4/100
    = 2/10
    = 0.2