Real Numbers English Medium Free Online Test 1 Mark Questions 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 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 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.

  3. Which one of the following is an irrational number

    (a)

    \(\sqrt { 25 } \)

    (b)

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

    (c)

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

    (d)

    \(\pi\)

  4. The smallest rational number by which \(\frac { 1 }{ 3 } \)  should be multiplied so that its decimal expansion terminates after one place of decimal is

    (a)

    \(\frac { 1 }{ 10 } \)

    (b)

    \(\frac { 3 }{ 10 } \)

    (c)

    3

    (d)

    30

  5. The value of  \(0.\bar { 23 } +0.\bar { 22 } \) is 

    (a)

    \(0.\bar { 43 } \)

    (b)

    0.45

    (c)

    \(0.4\bar { 5 } \)

    (d)

    \(0.\bar { 45 } \)

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

    (a)

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

    (b)

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

    (c)

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

    (d)

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

  7. Irrational number has a________________ .

    (a)

    terminating decimal

    (b)

    no decimal part

    (c)

    non-terminating and recurring decimal

    (d)

    non-terminating and non-recurring decimal

  8. Which of the following are not rational numbers?

    (a)

    \(7\sqrt { 5 } \)

    (b)

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

    (c)

    \(\sqrt { 36 } -9\)

    (d)

    \(\pi +2\)

  9. The rational number lying between \(\frac { 1 }{ 5 } \) and \(\frac { 1 }{ 2 } \) is___________.

    (a)

    \(\frac { 7 }{ 20 } \)

    (b)

    \(\frac { 2 }{ 10 } \)

    (c)

    \(\frac { 2 }{ 7 } \)

    (d)

    \(\frac { 3 }{ 10 } \)

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

    (a)

    \(\sqrt { 2 } \)

    (b)

    \(\sqrt { 5 } \)

    (c)

    \(\sqrt { 3 } \)

    (d)

    \(\sqrt { 25 } \)

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