Real Numbers One Mark Questions

9th Standard

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Maths

Time : 00:30:00 Hrs
Total Marks : 15
    10 x 1 = 10
  1. If n is a natural number then \(\sqrt { n } \) is

    (a)

    always a natural number

    (b)

    always an irrational number

    (c)

    always a rational number

    (d)

    may be rational or irrational

  2. 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

  3. Which one of the following, regarding sum of two irrational numbers, is true?

    (a)

    always an irrational number

    (b)

    may be a rational or irrational number

    (c)

    always a rational number

    (d)

    always an integer.

  4. Which one of the following has a terminating decimal expansion?

    (a)

    \(\frac { 5 }{ 64 } \)

    (b)

    \(\frac { 8 }{ 9 } \)

    (c)

    \(\frac { 14 }{ 15 } \)

    (d)

    \(\frac { 1 }{ 12 } \)

  5. Which one of the following is an irrational number

    (a)

    \(\sqrt { 25 } \)

    (b)

    \(\sqrt { \frac { 9 }{ 4 } } \)

    (c)

    \(\frac { 7 }{ 11 } \)

    (d)

    \(\pi\)

  6. The decimal form of -\(\frac { 3 }{ 4 } \) is_______________

    (a)

    - 0.75

    (b)

    - 0.50

    (c)

    -0.25

    (d)

    - 0.125

  7. 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

  8. Which one of the following has terminating decimal expansion?

    (a)

    \(\frac { 7 }{ 9 } \)

    (b)

    \(\frac { 8 }{ 15 } \)

    (c)

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

    (d)

    \(\frac { 5 }{ 32 } \)

  9. Irrational number has a________________ .

    (a)

    terminating decimal

    (b)

    no decimal part

    (c)

    non-terminating and recurring decimal

    (d)

    non-terminating and non-recurring decimal

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

    (a)

    0.285741

    (b)

    0.428571

    (c)

    0.285714

    (d)

    0.574128

  11. 5 x 1 = 5
  12. The value of \(3\sqrt { 3 } +\sqrt { 3 } \) is ______________.

    ()

    \(4\sqrt { 3 } \)

  13. The value of \(\left[ \sqrt { { x }^{ 3 } } \right] ^{2/3}\) is

    ()

    x

  14. If \(\sqrt { 10 } \)= 3.1622, then the value of is \(\frac { 1 }{ \sqrt { 10 } } \) is_________.

    ()

    0.31623

  15. The rational number equivalent to \(\frac { 5 }{ 9 } \) such that its numerator is 25 is____________ .

    ()

    \(\frac { 25 }{ 45 } \)

  16. Divide \(15\sqrt { 12 } \) by \(3\sqrt { 3 } \)the result is ___________.

    ()

    10

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