# IMO- Mathematics Olympiad (SOF) Class 8: Questions 498 - 505 of 1029

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## Question number: 498

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.

50

b.

80

c.

60

d.

70

## Question number: 499

MCQ▾

### Question

If and, then is equal to________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 500

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.

13, 14

b.

3.5, 14.7

c.

35, 25

d.

4.5, 13.5

## Question number: 501

MCQ▾

### Question

The value of is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 502

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.

50

b.

60

c.

40

d.

30

## Question number: 503

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.

18 days

d.

17.2 days

## Question number: 504

MCQ▾

### Question

Number of prime factors in is

### Choices

Choice (4) Response

a.

3

b.

4

c.

2

d.

6

## Question number: 505

MCQ▾

### Question

If, then the value of is________.

### Choices

Choice (4) Response

a.

1

b.

3

c.

4

d.

2

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