9th Standard Maths English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Seven

9th Standard

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Maths

Time : 00:15:00 Hrs
Total Marks : 15

    Part A

    15 x 1 = 15
  1. If B ⊆ A then n(A∩B) is –––––––––.

    (a)

    n(A – B)

    (b)

    n(B)

    (c)

    n(B – A)

    (d)

    n(A)

  2. Which of the following is true?

    (a)

    \(\left( A\cup B \right) =B\cup A\)

    (b)

    \({ \left( A\cup B \right) }^{ ' }{ A }^{ ' }{ -B }^{ ' }\)

    (c)

    \({ \left( A\cap B \right) }^{ ' }={ A }^{ ' }\cap { B }^{ ' }\)

    (d)

    \(A-\left( B\cap C \right) =\left( A-B \right) \cap \left( A-C \right) \)

  3. Which of the following is not true?

    (a)

    Every rational number is a real number

    (b)

    Every integer is a rational number

    (c)

    Every real number is an irrational number

    (d)

    Every natural number is a whole number

  4. Which of the following is not an irrational number?

    (a)

    \(\sqrt { 2 } \)

    (b)

    \(\sqrt { 5 } \)

    (c)

    \(\sqrt { 3 } \)

    (d)

    \(\sqrt { 25 } \)

  5. The remainder when p(x) = x3 – ax2 + 6x – a is divided by (x – a) is ______________

    (a)

    –5a

    (b)

    \(\frac {1}{5}\)

    (c)

    5

    (d)

    5a

  6. (a-b-c)2 is equal to________

    (a)

    (a+b+c)2

    (b)

    (a+b+c)2

    (c)

    (-a + b + c)2

    (d)

    (a+b+c)2

  7. The correct statement out of the following is ________.

    (a)

    ΔABC ≅ ΔDEF

    (b)

    ΔABC ≅ ΔDEF

    (c)

    ΔABC ≅ ΔFDE

    (d)

    ΔABC ≅ ΔFED

  8. The angle subtend by a semicircle at the remaining part of the circumference is___________

    (a)

    60o

    (b)

    90o

    (c)

    120o

    (d)

    180°

  9. Signs of the abscissa and ordinate of a point in the fourth quadrant are respectively

    (a)

    (+,+)

    (b)

    ( –, –)

    (c)

    (–, +)

    (d)

    ( +, –)

  10. The distance between the points (4, -1) and the origin is___________

    (a)

    \(\sqrt{24}\)

    (b)

    \(\sqrt{37}\)

    (c)

    \(\sqrt{26}\)

    (d)

    \(\sqrt{17}\)

  11. The mean of a set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of discarded number is _______.

    (a)

    101

    (b)

    100

    (c)

    99

    (d)

    98

  12. The mean of the first 10 prime number is _______________

    (a)

    12.6

    (b)

    12.7

    (c)

    12.8

    (d)

    12.9

  13. if sin \(\alpha\) = \(\frac { 1 }{ 2 } \) and \(\alpha\) is a cute, then (3 cos\(\alpha\) - 4cos3 \(\alpha\)) is equal to

    (a)

    0

    (b)

    \(\frac { 1 }{ 2 } \)

    (c)

    \(\frac { 1 }{ 6 } \)

    (d)

    -1

  14. If the ratio of the sides of two cubes are 2:3, then ratio of their surface areas will be _______.

    (a)

    4 : 6

    (b)

    4 : 9

    (c)

    6 : 9

    (d)

    16 : 36

  15. A collection of one or more outcomes of an experiment is called _______.

    (a)

    Event

    (b)

    Outcome

    (c)

    Sample point

    (d)

    None of the above

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