# IMO- Mathematics Olympiad Class 10: Questions 456 - 461 of 958

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## Question number: 456

MCQ▾

### Question

Four vertices of a parallelogram taken in order are. What will be the ratio of a and b?

### Choices

Choice (4) Response

a.

b.

3: 1

c.

2: 1

d.

3: 4

## Question number: 457

MCQ▾

### Question

A Train maintains an average speed of 40 km/hr while going from L to M and maintains an average speed of 60 km/hr while coming back from M to L. the average speed of the bus is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 458

MCQ▾

### Question

Points are joined to form a quadrilateral. What will be the structure of quadrilateral?

### Choices

Choice (4) Response

a.

Parallelogram

b.

Rectangle

c.

Square

d.

Rhombus

## Question number: 459

MCQ▾

### Question

If are the midpoints of the sides of , the area of the triangle is ________

### Choices

Choice (4) Response

a.

96 sq. units

b.

24 sq. units

c.

48 sq. units

d.

50 sq. units

## Question number: 460

MCQ▾

### Question

The average of 10 results is 70. If the average of the first five results is 60 and that of the last five is 70, then the fifth result is ________

### Choices

Choice (4) Response

a.

20

b.

40

c.

50

d.

30

## Question number: 461

MCQ▾

### Question

If are the vertices of a right angle triangle, right angle at P, then a is ________

### Choices

Choice (4) Response

a.

3

b.

4

c.

2

d.

1

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