# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 550 - 555 of 1022

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## Question number: 550

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MCQ▾

### Question

There are 6 stones in a box with numbers 1 to 6 marked on them. What is the probability of drawing a stone with number 6?

### Choices

Choice (4) Response

a.

b.

c.

d.

1

## Question number: 551

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MCQ▾

### Question

The total cost of 5 books and 3 bags is Rs. 2500. If one book costs Rs. 25 less than one bag, find the price of each book and bag respectively.

### Choices

Choice (4) Response

a.

Rs. 320, Rs. 380

b.

Rs. 303, Rs. 328

c.

Rs. 300, Rs. 320

d.

Rs. 330, Rs. 308

## Question number: 552

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MCQ▾

### Question

Three bells toll at intervals of 12 seconds, 16 seconds and 18 seconds respectively. They start ringing together at a particular time. They next toll together after ________.

### Choices

Choice (4) Response

a.

2.8 minutes

b.

2.4 minutes

c.

3.2 minutes

d.

1.2 minutes

## Question number: 553

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MCQ▾

### Question

Equal sums of Rs. 3400 were lent to Kajal and Misha at 2 % per annum for a period of 3 years and 5 years respectively. Find the difference of the interest paid by Kajal and Misha.

### Choices

Choice (4) Response

a.

Rs. 167

b.

Rs. 260

c.

Rs. 136

d.

Rs. 366

## Question number: 554

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MCQ▾

### Question

When Ravesh travelled 45 km he found that of the entire journey was still left. The length of the journey left is

### Choices

Choice (4) Response

a.

67.5 km

b.

45 km

c.

150 km

d.

112.5 km

## Question number: 555

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MCQ▾

### Question

Three bells toll at intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They next toll together after ________.

### Choices

Choice (4) Response

a.

12 minutes

b.

24 minutes

c.

18 minutes

d.

6 minutes