Quiz - 1 For Class X (Quadratic Equation)

10 Questions | Total Attempts: 231

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Quiz - 1 For Class X (Quadratic Equation) - Quiz


Questions and Answers
  • 1. 
    If the equation x+ 4x + k = 0 has a real and distinct roots, then 
    • A. 

      K < 4 

    • B. 

      K > 4

    • C. 

      K ≥ 4 

    • D. 

      K ≤4

  • 2. 
    If the equation x2 - ax + 1 = 0 has two distinct roots, then 
    • A. 

      |a|= 2

    • B. 

      |a|  < 2

    • C. 

      |a| > 2

    • D. 

      None of these

  • 3. 
    If ax2 + bx + c = 0 has equal roots, then c= ?
    • A. 

      -b/2a

    • B. 

      B/2a

    • C. 

      - b2/2a

    • D. 

      B2/4a

  • 4. 
    If x = 1 is a common root of ax2 + ax + 2 = 0 and x2 + x + b = 0 then ab = ?
    • A. 

      1

    • B. 

      2

    • C. 

      4

    • D. 

      3

  • 5. 
    If a and b are roots of the equation x2 + ax + b = 0, then a + b = ?
    • A. 

      1

    • B. 

      2

    • C. 

      - 2

    • D. 

      - 1

  • 6. 
    If one root of the equation whose one root is 2 and sum of whose roots is zero, is 
    • A. 

      X2 + 4 = 0

    • B. 

      X2  - 4 = 0

    • C. 

      4x2 - 1 = 0

    • D. 

      X2 - 2 = 0

  • 7. 
    If y = 1 is a common root of the equations ay2 + ay + 3 = 0 and y2 + y + b = 0 then ab equals ?
    • A. 

      3

    • B. 

      -7/2

    • C. 

      6

    • D. 

      -3

  • 8. 
    The values of k for which the quadratic equation 16x2 + 4 kx + 9 = 0 has real and equal roots are 
    • A. 

      6, -1/6

    • B. 

      36, -36

    • C. 

      6, -6

    • D. 

      3/4, - 3/4

  • 9. 
    Find two numbers whose sum is 24 and product is 143
    • A. 

      13, 11

    • B. 

      12, 12

    • C. 

      8, 16

    • D. 

      None of these

  • 10. 
    Find two consecutive odd positive integers sum of whose squares is 290
    • A. 

      13, 15

    • B. 

      11, 13

    • C. 

      7, 9

    • D. 

      5, 7

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