#### 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