CBSE Board Practice

CBSE Grade X - Quadratic Equations
Question 1
1.
    • One pipe can fill a cistern in
    • 4
    • hours less than the other.
    • The two pipes together can fill it in
    • 6
      9

      26
    • hrs.
    • Find the time that each pipe will take to fill the cistern.
  • 9 hr , 12 hr
  • 11 hr , 15 hr
  • 14 hr , 17 hr
  • 10 hr , 14 hr
  • 12 hr , 16 hr
Question 2
2.
    • Solve :
    • (
      x
      4
       
      9
      x
      2
       
      +
      20
      )
      =
      0



  • 5
    ,
    (



    5
    )
    ,
    2
    ,
    (
    2
    )



  • 3
    ,
    (



    3
    )
    ,
    (
    1
    )
    ,
    (
    5
    )



  • 7
    ,
    (



    7
    )
    ,
    5
    ,
    0
  • 5
    ,
    (
    5
    )
    ,
    1
    ,
    (
    3
    )
  • 4


    5
    ,
    (
    4


    5
    )
    ,
    3
    ,
    (
    1
    )
Question 3
3.
Twice the square of a number exceeds 5 times the number by 375. Find the number
  • 15
  • 16
  • 12
  • 17
  • 14
Question 4
4.
    • The product of the roots of the quadratic equation
    • (
      x
      2
       
      14
      x
      +
      48
      )
      =
      0
    • is
  • 45
  • 48
  • 47
  • 50
  • 49
Question 5
5.
    • Solve :
    •  
       
      6
      x
      2
      b
        +  
       
       
      2
      x
      b
         
       
       
      3
      x
         
       
       
      1
    • = 0
  •  
     
    1

     
     
    3
    ,
     
     
    2

     
     
    4
    b
  •  
     
    2

     
     
    3
    ,
    0
  •  
     
    1

     
     
    4
    ,
     
     
    1

     
     
    3
    b
  • 0
    ,
     
     
    1

     
     
    b
  •  
     
    1

     
     
    2
    ,
     
     
    1

     
     
    b
Question 6
6.
    • Solve :
    •  
       
      5

       
       
      (
      x
      3
      )
        +  
       
       
      3

       
       
      (
      x
      +
      5
      )
      =
       
       
      5
  • (
    3



    3
    )
    ,
    (
    5



    3
    )
  • (
    3
    )
    ,
    (
    5
    )
  • (
    3



    5
    )
    ,
    (
    5



    5
    )
  • (
    3



    4
    )
    ,
    (
    5



    4
    )
  • (
    3



    2
    )
    ,
    (
    5



    2
    )
Question 7
7.
    • Find the quadratic equation with roots
    • (
      -9
      ,
      -1
      )
  • (
    x
    2
     
    +
    11
    x
    +
    10
    )
    =
    0
  • (
    x
    2
     
    +
    10
    x
    +
    9
    )
    =
    0
  • (
    x
    2
     
    +
    9
    x
    )
    =
    0
  • (
    x
    2
     
    +
    7
    x
    18
    )
    =
    0
  • (
    x
    2
     
    +
    12
    x
    +
    11
    )
    =
    0
Question 8
8.
    • Solve :
    •  
       
      14
      x
      2
      a
        +  
       
       
      12
      x
         
       
       
      7
      x
      a
         
       
       
      6
    • = 0
  •  
     
    2

     
     
    3
    a
    ,
     
     
    1

     
     
    4
  •  
     
    4

     
     
    7
    a
    ,
     
     
    3

     
     
    2
  •  
     
    6

     
     
    5
    a
    ,
     
     
    1
  •  
     
    8

     
     
    7
    a
    ,
     
     
    1

     
     
    2
  •  
     
    6

     
     
    7
    a
    ,
     
     
    1

     
     
    2
Question 9
9.
    • Find the quadratic equation, the sum of whose roots is
    • 2
    • and product is
    • -63
  • (
    x
    2
     
    5
    x
    63
    )
    =
    0
  • (
    x
    2
     
    2
    x
    63
    )
    =
    0
  • (
    x
    2
     
    +
    x
    63
    )
    =
    0
  • (
    2
    x
    2
     
    2
    x
    63
    )
    =
    0
  • (
    2
    x
    63
    )
    =
    0
Question 10
10.
    • Factorize
    • (
      100
      x
      2
       
      16
      )
      • (
        10
        x
        4
        )
      • (
        10
        x
        4
        )
      • (
        10
        x
        2
        )
      • (
        10
        x
        +
        8
        )
      • (
        10
        x
        +
        4
        )
      • (
        10
        x
        4
        )
      • (
        10
        x
        +
        4
        )
      • (
        10
        x
        +
        4
        )
      • (
        10
        x
        +
        2
        )
      • (
        10
        x
        8
        )