# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 143 - 149 of 929

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## Question number: 143

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MCQ▾

### Question

In the given figure and, then value of x is________. Image Shows the Lines Image defines the lines and angle and find the value of x

### Choices

Choice (4) Response

a.

80˚

b.

85˚

c.

90˚

d.

95˚

## Question number: 144

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MCQ▾

Value of

### Choices

Choice (4) Response

a.

-1

b.

0

c.

x

d.

1

## Question number: 145

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MCQ▾

### Question

In the figure, find ________ In the Figure Angle PRQ is Given Showing the figure and find angle PQR

### Choices

Choice (4) Response

a.

120˚

b.

105˚

c.

100˚

d.

115˚

## Question number: 146

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MCQ▾

### Question

How many sides does a regular polygon have, each angle of which is of measure 150˚?

### Choices

Choice (4) Response

a.

17

b.

18

c.

16

d.

12

## Question number: 147

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MCQ▾

### Question

If the product of two surds is a rational number, then each one of them is called the ________ of the other________

### Choices

Choice (4) Response

a.

Rationalizing factor

b.

Binomial surd

c.

Conjugate surd

d.

Negative

## Question number: 148

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MCQ▾

### Question

If two complementary angles are in the ratio 4: 11, then the angles are________

### Choices

Choice (4) Response

a.

30˚, 60˚

b.

61˚, 29˚

c.

24˚, 66˚

d.

56˚, 34˚

## Question number: 149

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MCQ▾

### Question

In a parallelogram, the sum of the angle bisectors of two adjacent angles is ________ Image of Parallelogram ABCD Image defines the ABCD is a parallelogram and AO and BO are bisectors find the sum of the angle bisectors of two adjacent angles

### Choices

Choice (4) Response

a.

60˚

b.

45˚

c.

90˚

d.

30˚