# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 811 - 817 of 1022

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## Question number: 811

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MCQ▾

### Question

The ratio of the radii of two hula-hoops is 2: 5. What is the ratio of their area?

### Choices

Choice (4)Response

a.

25: 4

b.

2: 5

c.

4: 25

d.

3: 2

## Question number: 812

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MCQ▾

### Question

The radius of the given circle is 7 cm, then the area of the shaded portion is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 813

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MCQ▾

### Question

The quadrilateral which has both line and rotational symmetry of order more than 1 is ________.

### Choices

Choice (4)Response

a.

Rhombus

b.

Square

c.

Parallelogram

d.

Rectangle

## Question number: 814

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MCQ▾

### Question

The height of an isosceles triangle is cm long and its equivalent sides are 10 cm long. Its area is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 815

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MCQ▾

### Question

If and , then the value of is ________.

### Choices

Choice (4)Response

a.

1534

b.

1781

c.

1625

d.

1624

## Question number: 816

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MCQ▾

### Question

‘Better’ is related to ‘worse’ as ‘complicated’ is related to ________.

### Choices

Choice (4)Response

a.

Durable

b.

Hard

c.

Easy

d.

Tricky

## Question number: 817

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MCQ▾

### Question

A well of diameter 80 cm has a stone wall around it. If the length of the outer edge of the wall is 440 cm, then the width of the wall is ________.

### Choices

Choice (4)Response

a.

20 cm

b.

30 cm

c.

60 cm

d.

50 cm

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