# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 566 - 573 of 1042

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## Question 566

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### Question

MCQ▾

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 567

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### Question

MCQ▾

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 568

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### Question

MCQ▾

If, then the value of a is

### Choices

Choice (4)Response
a.3
b.4
c.1
d.2

## Question 569

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### Question

MCQ▾

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 570

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### Question

MCQ▾

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 571

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### Question

MCQ▾

Number of prime factors in is

### Choices

Choice (4)Response
a.20
b.22
c.23
d.28

## Question 572

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### Question

MCQ▾

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

## Question 573

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### Question

MCQ▾

The value of when is________.

### Choices

Choice (4)Response
a.85
b.84
c.80
d.81