# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 166 - 171 of 931

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## Question 166

### Question

MCQ▾

Find the value of

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 167

### Question

MCQ▾

If a straight line meets two other straight lines so as to make the sum of the two interior angles on one side of the transversal less than two right angles, then the other straight lines extended infinitely, will meet ________ the transversal

### Choices

Choice (4)Response

a.

Can ′ t be determined

b.

On that side of

c.

On another side of

d.

On

## Question 168

### Question

MCQ▾

The measure of an angle is twice times the measure of its supplementary angle. Then the angles are________

### Choices

Choice (4)Response

a.

18˚, 72˚

b.

50˚, 200˚

c.

120˚, 60˚

d.

40˚, 160˚

## Question 169

### Question

MCQ▾

In figure, lines a and b intersect at O. if , the value of y, z and u respectively is ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 170

### Question

MCQ▾

In a parallelogram PQRS, , then the measurement of ∠ S is ________

### Choices

Choice (4)Response

a.

65˚

b.

100˚

c.

75˚

d.

95˚

## Question 171

### Question

MCQ▾

The angles of quadrilateral are in the ratio . All angles of a quadrilaterals are________

### Choices

Choice (4)Response

a.

30˚, 90˚, 60˚, 20˚

b.

30˚, 60˚, 45˚, 15˚

c.

45˚, 20˚, 30˚, 60˚

d.

36˚, 60˚, 108˚, 156˚