# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 498 - 505 of 1042

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## Question 498

### Question

MCQ▾

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

### Choices

Choice (4)Response

a.

80

b.

70

c.

60

d.

50

## Question 499

### Question

MCQ▾

If and , then is equal to________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 500

### Question

MCQ▾

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 501

### Question

MCQ▾

The value of is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 502

### Question

MCQ▾

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 503

### Question

MCQ▾

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.

20 days

b.

17 days

c.

21 days

d.

18 days

## Question 504

### Question

MCQ▾

Number of prime factors in is

### Choices

Choice (4)Response

a.

4

b.

2

c.

6

d.

3

## Question 505

### Question

MCQ▾

If , then the value of is________.

### Choices

Choice (4)Response

a.

3

b.

1

c.

2

d.

4