# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 498 - 504 of 1040

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## Question number: 498

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MCQ▾

### Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 2: 3: 4. If their total value is Rs. 20, the number of 5 paise coins is ________.

### Choices

Choice (4) Response

a.

80

b.

70

c.

60

d.

50

## Question number: 499

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MCQ▾

### Question

If and, then is equal to________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 500

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MCQ▾

### Question

Two numbers are in the ratio 1: 3. If each number is increased by 9, the ratio becomes 3: 5. The numbers are________.

### Choices

Choice (4) Response

a.

4.5,13.5

b.

13,14

c.

3.5,14.7

d.

35,25

## Question number: 501

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MCQ▾

### Question

The value of is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 502

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MCQ▾

### Question

The ratio of boys and girls in a school of 660 students is. How many girls should be admitted to make ratio?

### Choices

Choice (4) Response

a.

30

b.

50

c.

40

d.

60

## Question number: 503

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MCQ▾

### Question

can do a piece of work in 50 days. He works at it for 5 days and then alone finishes the work in 30 days. The two together could have completed the work in ________.

### Choices

Choice (4) Response

a.

17.5 days

b.

17 days

c.

17.2 days

d.

18 days

## Question number: 504

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MCQ▾

### Question

Number of prime factors in is

### Choices

Choice (4) Response

a.

4

b.

2

c.

6

d.

3