# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 237 - 242 of 929

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## Question number: 237

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MCQ▾

### Question

On plotting the points A (2,9), B (6,11), C (10,9), D (8,5), E (4,5) and joining AB, BC, CD, CE, EA, Which of the following figure is obtained?

### Choices

Choice (4)Response

a.

Pentagon

b.

Trapezoid

c.

Parallelogram

d.

Hexagon

## Question number: 238

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MCQ▾

### Question

Squares ABCD and EFGH are congruent, and G is the center of square ABCD. The area of the shaded region in the plane is ________ Given the Squares ABCD and EFGH Are CongruentGiven the Squares ABCD and EFGH are congruent and AB is 10 cm and G is the center of square ABCD and fined the area of the shaded region in the plane

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 239

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MCQ▾

### Question

27 metal balls each of radius r are melted together to from one big sphere of radius R. Then the ratio of surface area of the big sphere to that of a ball is ________

### Choices

Choice (4)Response

a.

3

b.

c.

d.

9

## Question number: 240

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MCQ▾

### Question

A running track is the ring formed by two concentric circles. It is 15 feet wide. The circumferences of the two circles differ by about ________

### Choices

Choice (4)Response

a.

65 feet

b.

94 feet

c.

75 feet

d.

90 feet

## Question number: 241

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MCQ▾

### Question

From the adjoining figure . The value of x is ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 242

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MCQ▾

### Question

A rectangle is divided into four smaller rectangles, as shown in the figure. Three of them have areas, and as indicated. Then the area of the shaded rectangle is ________ Given the Rectangle is Divided into Four RectanglesGiven the rectangle is divided into four smaller rectangles and three of them have area 9 units, 21 units, 38 unit as indicated and find the area of the shaded rectangle

### Choices

Choice (4)Response

a.

b.

c.

d.

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