# IMO- Mathematics Olympiad Class 9: Questions 238 - 242 of 919

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## Question number: 238

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.

Parallelogram

b.

Hexagon

c.

Trapezoid

d.

Pentagon

## Question number: 239

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 ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 240

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.

9

c.

d.

## Question number: 241

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.

75 feet

b.

94 feet

c.

65 feet

d.

90 feet

## Question number: 242

MCQ▾

### Question

From the adjoining figure . The value of x is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page