# IMO- Mathematics Olympiad Class 7: Questions 474 - 479 of 1012

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## Question number: 474

MCQ▾

### Question

Two equal containers are filled with a mixture of sunflower-oil and fortune-oil. The concentration of sunflower-oil in each of the containers is 10 % and 15 % respectively. What is ratio of fortune-oil in both the containers respectively?

### Choices

Choice (4) Response

a.

5: 6

b.

6: 5

c.

18: 17

d.

17: 18

## Question number: 475

MCQ▾

### Question

By selling a shirt for Rs. 285 a shopkeeper loses 5%. At what price should he sell the shirt so as to gain 15%?

### Choices

Choice (4) Response

a.

Rs. 295

b.

Rs. 345

c.

Rs. 325

d.

Rs. 300

## Question number: 476

MCQ▾

### Question

A diver was diving 80 meters below sea level. He went down 50 meters more and came up 40 meters. How far below sea level did he dives?

### Choices

Choice (4) Response

a.

meters

b.

meters

c.

meters

d.

meters

## Question number: 477

MCQ▾

### Question

Kiran answered of the questions on her quiz correctly. What percent of the questions did she answer incorrectly?

### Choices

Choice (4) Response

a.

75%

b.

50%

c.

34%

d.

25%

## Question number: 478

MCQ▾

### Question

Jimmy’s and her mother both had birthdays last month. The sum of their ages is 75 years. His mother’s age is 4 times Jimmy’s age. What is age of Jimmy’s mother?

### Choices

Choice (4) Response

a.

50 years

b.

45 years

c.

60 years

d.

15 years

## Question number: 479

MCQ▾

### Question

Each of two groups of tourists has 30 students. If of the first group and of the second group board buses to travel to a tour, how many more students of the first group board buses than of the second group?

### Choices

Choice (4) Response

a.

4

b.

5

c.

40

d.

2

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