# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 564 - 572 of 1040

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## Question number: 564

Edit
MCQ▾

### Question

The ratio which bears to is________.

### Choices

Choice (4)Response

a.

1.68

b.

1.78

c.

1.64

d.

1.50

## Question number: 565

Edit
MCQ▾

### Question

The value of , is________.

### Choices

Choice (4)Response

a.

4

b.

3

c.

7

d.

5

## Question number: 566

Edit
MCQ▾

### Question

A man completes of a job in 15 days. At this rate how many more days will it take him to finish the job?

### Choices

Choice (4)Response

a.

22.5

b.

22

c.

27

d.

25

## Question number: 567

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MCQ▾

### Question

can do a piece of work in 10 days and can do alone it in 12 days. B works at it for 5 days and then leaves. alone can finish the remaining work in________.

### Choices

Choice (4)Response

a.

5.8 days

b.

6.5 days

c.

6 days

d.

7.5 days

## Question number: 568

Edit
MCQ▾

### Question

If , then the value of a is

### Choices

Choice (4)Response

a.

3

b.

4

c.

1

d.

2

## Question number: 569

Edit
MCQ▾

### Question

1.20 of a number equals 0.36 of another number. The ratio of the number is________.

### Choices

Choice (4)Response

a.

3: 2

b.

2: 3

c.

3: 10

d.

10: 3

## Question number: 570

Edit
MCQ▾

### Question

If 4 men take an hour to dig a ditch, how long should it take 10 men to dig a ditch of the same type?

### Choices

Choice (4)Response

a.

23 min

b.

20 min

c.

30 min

d.

24 min

## Question number: 571

Edit
MCQ▾

### Question

Number of prime factors in is

### Choices

Choice (4)Response

a.

20

b.

22

c.

23

d.

28

## Question number: 572

Edit
MCQ▾

### Question

If A: B = 3: 4 and B: C = 5: 6, then C: A is equal to, ________.

### Choices

Choice (4)Response

a.

24: 15

b.

12: 23

c.

15: 14

d.

25: 14

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