#### 9th Standard Maths English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Seven

9th Standard

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Maths

Time : 00:15:00 Hrs
Total Marks : 15

Part A

15 x 1 = 15
1. If B ⊆ A then n(A∩B) is

(a)

n(A – B)

(b)

n(B)

(c)

n(B – A)

(d)

n(A)

2. Which of the following is true?

(a)

$\left( A\cup B \right) =B\cup A$

(b)

${ \left( A\cup B \right) }^{ ' }{ A }^{ ' }{ -B }^{ ' }$

(c)

${ \left( A\cap B \right) }^{ ' }={ A }^{ ' }\cap { B }^{ ' }$

(d)

$A-\left( B\cap C \right) =\left( A-B \right) \cap \left( A-C \right)$

3. 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

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

(a)

$\sqrt { 2 }$

(b)

$\sqrt { 5 }$

(c)

$\sqrt { 3 }$

(d)

$\sqrt { 25 }$

5. The remainder when p(x) = x3 – ax2 + 6x – a is divided by (x – a) is

(a)

–5a

(b)

$\frac {1}{5}$

(c)

5

(d)

5a

6. (a-b-c)2 is equal to________

(a)

(a+b+c)2

(b)

(a+b+c)2

(c)

(-a + b + c)2

(d)

(a+b+c)2

7. The correct statement out of the following is

(a)

ΔABC ≅ ΔDEF

(b)

ΔABC ≅ ΔDEF

(c)

ΔABC ≅ ΔFDE

(d)

ΔABC ≅ ΔFED

8. The angle subtend by a semicircle at the remaining part of the circumference is___________

(a)

60o

(b)

90o

(c)

120o

(d)

180°

9. Signs of the abscissa and ordinate of a point in the fourth quadrant are respectively

(a)

(+,+)

(b)

( –, –)

(c)

(–, +)

(d)

( +, –)

10. The distance between the points (4, -1) and the origin is___________

(a)

$\sqrt{24}$

(b)

$\sqrt{37}$

(c)

$\sqrt{26}$

(d)

$\sqrt{17}$

11. The mean of a set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of discarded number is

(a)

101

(b)

100

(c)

99

(d)

98

12. The mean of the first 10 prime number is

(a)

12.6

(b)

12.7

(c)

12.8

(d)

12.9

13. if sin $\alpha$ = $\frac { 1 }{ 2 }$ and $\alpha$ is a cute, then (3 cos$\alpha$ - 4cos3 $\alpha$) is equal to

(a)

0

(b)

$\frac { 1 }{ 2 }$

(c)

$\frac { 1 }{ 6 }$

(d)

-1

14. If the ratio of the sides of two cubes are 2:3, then ratio of their surface areas will be

(a)

4 : 6

(b)

4 : 9

(c)

6 : 9

(d)

16 : 36

15. A collection of one or more outcomes of an experiment is called

(a)

Event

(b)

Outcome

(c)

Sample point

(d)

None of the above