Real Numbers English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

    Reg.No. :
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Maths

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. If a number has a non-terminating and non-recurring decimal expansion, then it is______________ .

    (a)

    a rational number

    (b)

    a natural number

    (c)

    an irrational number

    (d)

    an integer

  2. Which of the following are irrational numbers?
    \(\sqrt { 2+\sqrt { 3 } } \)
    \(\sqrt [ 3 ]{ 5+\sqrt { 7 } } \)
    \(\sqrt { 8-\sqrt [ 3 ]{ 8 } } \)
    \(\sqrt { 4+\sqrt { 25 } } \)

    (a)

    (ii), (iii) and (iv)

    (b)

    (i), (ii) and (iv)

    (c)

    (i), (ii) and (iii)

    (d)

    (i), (iii) and (iv)

  3. If \(\frac { 1 }{ 7 } \)= 0.142857, then the value of is______________.

    (a)

    0.285741

    (b)

    0.428571

    (c)

    0.285714

    (d)

    0.574128

  4. The product of \(2\sqrt { 5 } \) and \(6\sqrt { 5 } \) is_______________.

    (a)

    \(12\sqrt { 5 } \)

    (b)

    60

    (c)

    40

    (d)

    \(8\sqrt { 5 } \)

  5. The value of \(\bar { 0.03 } \) +\(\bar { 0.03 } \)  is ___________.

    (a)

    \(\bar { 0.09 } \)

    (b)

    \(\bar { 0.09 } \)

    (c)

    \(\bar { 0.09 } \)

    (d)

    0

  6. In simple form,\(\sqrt [ 3 ]{ 54 } \) is ?

    (a)

    \(3\sqrt [ 3 ]{ 2 } \)

    (b)

    \(3\sqrt { 27 } \)

    (c)

    \(3\sqrt { 2 } \)

    (d)

    \(\sqrt { 3 } \)

  7. \(\sqrt [ 4 ]{ 405 } =h\sqrt [ 4 ]{ 5 } \), then h=

    (a)

    5

    (b)

    4

    (c)

    2

    (d)

    3

  8. Rationalising the denominator  \(\cfrac { 1 }{ \sqrt [ 3 ]{ 3 } } \)

    (a)

    3

    (b)

    \(\cfrac { { 3 }^{ \frac { 2 }{ 3 } } }{ 3 } \)

    (c)

    \(\sqrt { 3 } \)

    (d)

    \(\sqrt [ 3 ]{ 3 } \)

  9. \(\cfrac { \sqrt [ 3 ]{ 27 } }{ \sqrt [ 5 ]{ 3 } } \) is equal to_______

    (a)

    \(5\sqrt { 9 } \)

    (b)

    \(5\sqrt { 6 } \)

    (c)

    \(5\sqrt { 24 } \)

    (d)

    \(\sqrt [ 5 ]{ 30 } \)

  10. The length of a square is 1.2X103 m. Its area is_______

    (a)

    14.4 X 106

    (b)

    1.44 X 106

    (c)

    0.144 X 10

    (d)

    1440

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