# IMO- Mathematics Olympiad (SOF) Class 7: Questions 503 - 508 of 1012

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## Question number: 503

MCQ▾

### Question

There are 7 marbles in a box in which 5 are red and 2 are blue. What is the probability of getting a red marble?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 504

MCQ▾

### Question

The cost price of ear-rings is Rs. 5200 and the loss percent is . Find the selling price of the ear-rings.

### Choices

Choice (4) Response

a.

Rs. 5540

b.

Rs. 3850

c.

Rs. 4250

d.

Rs. 5850

## Question number: 505

MCQ▾

### Question

Each of two groups of tourists has 60 people. If of the first group and of the second group board buses to travel to a museum, how many more people of the first group board buses than of the second group?

### Choices

Choice (4) Response

a.

4

b.

2

c.

40

d.

5

## Question number: 506

MCQ▾

### Question

Aman’s mother was 21 years old when his sister was born. His father is 8 years older than his mother. Now Aman is 17 years old and his sister is 3 years older than him. What is the present age of Aman’s father?

### Choices

Choice (4) Response

a.

47 years

b.

46 years

c.

50 years

d.

49 years

## Question number: 507

MCQ▾

### Question

A library has 52 video-tapes that can be checked out. On Monday the librarian counted 17 video-tapes still on the shelf. How many video-tapes were checked out from the library?

### Choices

Choice (4) Response

a.

44

b.

45

c.

35

d.

69

## Question number: 508

MCQ▾

### Question

The ratio of computers to mobiles in a shop is 6: 5. There are 32 fewer mobiles than computers. What is the total number of mobiles and computers in the shop?

### Choices

Choice (4) Response

a.

352

b.

215

c.

192

d.

160