Real Numbers One Mark Questions

9th Standard

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Maths

Time : 00:30:00 Hrs
Total Marks : 10
    5 x 1 = 5
  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. Irrational number has a________________ .

    (a)

    terminating decimal

    (b)

    no decimal part

    (c)

    non-terminating and recurring decimal

    (d)

    non-terminating and non-recurring decimal

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

    (a)

    0.285741

    (b)

    0.428571

    (c)

    0.285714

    (d)

    0.574128

  5. Which of the following are not rational numbers?

    (a)

    \(7\sqrt { 5 } \)

    (b)

    \(\frac { 7 }{ \sqrt { 5 } } \)

    (c)

    \(\sqrt { 36 } -9\)

    (d)

    \(\pi +2\)

  6. 5 x 1 = 5
  7. The value of \(3\sqrt { 3 } +\sqrt { 3 } \) is ______________.

    ()

    \(4\sqrt { 3 } \)

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

    ()

    x

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

    ()

    0.31623

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

    ()

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

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

    ()

    10

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