# IMO- Mathematics Olympiad (SOF) Class 9: Questions 179 - 184 of 919

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## Question number: 179

MCQ▾

### Question

If two complementary angles are in the ratio 13: 5, then the angles are________

### Choices

Choice (4) Response

a.

15˚, 85˚

b.

65˚, 25˚

c.

13 x˚, 5 x˚

d.

65˚, 35˚

## Question number: 180

MCQ▾

### Question

If a right triangle has sides of length 1 and , which of the following could be the length of the remaining side?

1. 1

### Choices

Choice (4) Response

a.

2 Only

b.

1 And 3 Only

c.

1 Only

d.

3 Only

## Question number: 181

MCQ▾

### Question

If and x and y are positive integers, then y could be which of the following?

### Choices

Choice (4) Response

a.

3

b.

5

c.

4

d.

2

## Question number: 182

MCQ▾

### Question

In the figure, form a linear pair and . Then a, b respectively are________

### Choices

Choice (4) Response

a.

70˚, 100˚

b.

80˚, 120˚

c.

110˚, 70˚

d.

120˚, 80˚

## Question number: 183

MCQ▾

### Question

All the three quadrilaterals ADEC, ABIH and BCGF are squares and if the area of and area of, then find the area of BCGF?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 184

MCQ▾

### Question

If two supplementary angles are in the ratio 13: 5, then the angles is ________

### Choices

Choice (4) Response

a.

130˚, 50˚

b.

125˚, 55˚

c.

145˚, 35˚

d.

120˚, 60˚

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