#### 9th Standard Maths English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021 Part - 7

9th Standard

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Maths

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

Part A

15 x 1 = 15
1. Which of the following is correct?

(a)

{7} ∈ {1,2,3,4,5,6,7,8,9,10}

(b)

7 ∈ {1,2,3,4,5,6,7,8,9,10}

(c)

7 ∉ {1,2,3,4,5,6,7,8,9,10}

(d)

{7} $\nsubseteq$ {1,2,3,4,5,6,7,8,9,10}

2. The set {x: x ∈ A, x ∈ B, x ∉ A ∩ B} is___________.

(a)

A ∩ B

(b)

A U B

(c)

A - B

(d)

A Δ B

3. If A and B are two non-empty sets, then (A-B)U(A⋂B) is

(a)

A

(b)

B

(c)

ф

(d)

U

4. Which one of the following is an irrational number

(a)

$\sqrt { 25 }$

(b)

$\sqrt { \frac { 9 }{ 4 } }$

(c)

$\frac { 7 }{ 11 }$

(d)

$\pi$

5. 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

6. Which is the best example of a number written in scientific notation?

(a)

0.5 x 105

(b)

0.1254

(c)

5.367 x 10-6

(d)

12.5 x 102

7. Which is the best example of a number written in scientific notation?

(a)

2.71 X 105

(b)

0.6 X 104

(c)

0.9871

(d)

125.4 X 104

8. Degree of the polynomial (y3–2)(y3 + 1) is

(a)

9

(b)

2

(c)

3

(d)

6

9. The linear equation in one variable is

(a)

2x + 2 = y

(b)

5x − 7 = 6 − 2x

(c)

2t(5 − t) = 0

(d)

7p − q = 0

10. In a cyclic quadrilaterals ABCD, ㄥA=4x,ㄥC=2x the value of x is

(a)

30°

(b)

20°

(c)

15°

(d)

25°

11. The points (–5, 2) and (2, –5) lie in the ________

(a)

(b)

(c)

(d)

12. Let m be the mid point and b be the upper limit of a class in a continuous frequency distribution. The lower limit of the class is

(a)

2m - b

(b)

2m+b

(c)

m-b

(d)

m-2b.

13. The value of $\frac { 2tan30° }{ 1-{ tan }^{ 2 }30° }$ is equal to

(a)

cos600

(b)

sin600

(c)

tan600

(d)

sin300

14. The perimeter of an equilateral triangle is 30 cm. The area is

(a)

$10\sqrt { 3 }$ cm2

(b)

$12\sqrt { 3 }$ cm2

(c)

$15\sqrt { 3 }$ cm2

(d)

$25\sqrt { 3 }$ cm 2

15. Which of the following cannot be taken as probability of an event?

(a)

0

(b)

0.5

(c)

1

(d)

-1