Number System


  1. Which of the following fractions does not lie between
    5
    and
    8
    ?
    615









  1. View Hint View Answer Discuss in Forum

    5
    = 0.83
    6

    8
    = 0.53
    15

    6
    = 0.86
    7

    Clearly, 0.53 < 0.83 < 0.86

    Correct Option: D

    5
    = 0.83
    6

    8
    = 0.53
    15

    6
    = 0.86
    7

    Clearly, 0.53 < 0.83 < 0.86


  1. The smallest fraction, which should be added to the sum of
    2
    1
    , 3
    1
    , 4
    1
    , and 5
    1
    2345

    to make the result a whole number, is









  1. View Hint View Answer Discuss in Forum

    2
    1
    + 3
    1
    + 4
    1
    + 5
    1
    2345

    = (2 + 3 + 4 + 5) +
    1
    +
    1
    +
    1
    +
    1
    2345

    = 14 +
    30 + 20 + 15 + 12
    60

    = 14 +
    77
    = 14 + 1
    17
    6060

    = 15
    77
    60

    ∴  Required answer = 1 –
    77
    =
    60 − 17
    =
    43
    606060

    Correct Option: D

    2
    1
    + 3
    1
    + 4
    1
    + 5
    1
    2345

    = (2 + 3 + 4 + 5) +
    1
    +
    1
    +
    1
    +
    1
    2345

    = 14 +
    30 + 20 + 15 + 12
    60

    = 14 +
    77
    = 14 + 1
    17
    6060

    = 15
    77
    60

    ∴  Required answer = 1 –
    77
    =
    60 − 17
    =
    43
    606060



  1. The vulgar fraction of 0.3939 is :









  1. View Hint View Answer Discuss in Forum

    0.3939 = 0.39

    =
    39
    =
    13
    9933

    Correct Option: D

    0.3939 = 0.39

    =
    39
    =
    13
    9933


  1. If 3/4 of a number is 7 more than 1/6 of the number, then 5/3 of the number is :









  1. View Hint View Answer Discuss in Forum

    Let the number be x.
    According to the question,

    3x
    x
    = 7
    46

    ⇒ 
    9x − 2x
    = 7
    12

    ⇒  7x = 12 × 7
    ⇒  x =
    12 × 7
    = 12
    12

    ∴ 
    5x
    =
    5
    × 12 = 20
    33

    Correct Option: B

    Let the number be x.
    According to the question,

    3x
    x
    = 7
    46

    ⇒ 
    9x − 2x
    = 7
    12

    ⇒  7x = 12 × 7
    ⇒  x =
    12 × 7
    = 12
    12

    ∴ 
    5x
    =
    5
    × 12 = 20
    33



  1. If the sum of two numbers, one of which is 2/5 times the other, is 50, then the numbers are









  1. View Hint View Answer Discuss in Forum

    First number = x (let)

    ∴  Second number =
    2x
    5

    ∴  x +
    2x
    = 50
    5

    ⇒ 
    5x + 2x
    = 50
    5

    ⇒  5x + 2x = 50 × 5
    ⇒  7x = 250
    ⇒  x =
    250
    7

    ∴  Second number =
    2
    ×
    250
    =
    100
    577

    Correct Option: D

    First number = x (let)

    ∴  Second number =
    2x
    5

    ∴  x +
    2x
    = 50
    5

    ⇒ 
    5x + 2x
    = 50
    5

    ⇒  5x + 2x = 50 × 5
    ⇒  7x = 250
    ⇒  x =
    250
    7

    ∴  Second number =
    2
    ×
    250
    =
    100
    577