# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 577 - 584 of 1040

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## Question number: 577

Edit
MCQ▾

### Question

If, then the value of is________.

### Choices

Choice (4) Response

a.

2

b.

3

c.

4

d.

1

## Question number: 578

Edit
MCQ▾

### Question

When simplified, is equal to________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 579

Edit
MCQ▾

### Question

Number of prime factors in is

### Choices

Choice (4) Response

a.

4

b.

9

c.

6

d.

8

## Question number: 580

Edit
MCQ▾

### Question

A man completes of a job in 12 days. At this rate how many more days will it take him to finish the job?

### Choices

Choice (4) Response

a.

23

b.

27

c.

24

d.

26

## Question number: 581

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MCQ▾

### Question

can do a piece of work in 20 days and can do alone it in 10 days. B works at it for 5 days and then leaves. alone can finish the remaining work in________.

### Choices

Choice (4) Response

a.

10 days

b.

10.5 days

c.

5 days

d.

11 days

## Question number: 582

Edit
MCQ▾

### Question

Two numbers are in the ratio 7: 9. If each number is increased by 18, the ratio becomes 9: 11. The numbers are________.

### Choices

Choice (4) Response

a.

35,81

b.

63,81

c.

63,85

d.

65,35

## Question number: 583

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MCQ▾

### Question

A bag contains 50 paise, 25 paise and 10 paise coins in the ratio 1: 2: 3. If their total value is Rs. 26, the number of 50 paise coins is ________.

### Choices

Choice (4) Response

a.

50

b.

80

c.

30

d.

20

## Question number: 584

Edit
MCQ▾

### Question

If , then the value of is________.

### Choices

Choice (4) Response

a.

35

b.

31

c.

36

d.

39