#### Real Numbers English Medium Free Online Test 1 Mark Questions 2020-2021

9th Standard

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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)

$\sqrt { 25 }$