# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 501 - 506 of 1022

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## Question 501

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### Question

MCQ▾

The ratio of cows to dogs in a city is 8: 5. There are 33 fewer dogs than cows. What is the total number of cows and dogs in the city?

### Choices

Choice (4)Response
a.98
b.143
c.214
d.87

## Question 502

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### Question

MCQ▾

A drum of food oil is full. When 12 liters of oil is drawn from it, it is full. The capacity of the drum is ________.

### Choices

Choice (4)Response
a.21 liters
b.Can’t be determined
c.18 liters
d.35 liters

## Question 503

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### Question

MCQ▾

There are 7 marbles in a box in which 5 are red and 2 are blue. What is the probability of getting a red marble?

### Choices

Choice (4)Response
a.
b.
c.
d.

## Question 504

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### Question

MCQ▾

The cost price of ear-rings is Rs. 5200 and the loss percent is . Find the selling price of the ear-rings.

### Choices

Choice (4)Response
a.Rs. 5850
b.Rs. 4250
c.Rs. 3850
d.Rs. 5540

## Question 505

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### Question

MCQ▾

Each of two groups of tourists has 60 people. If of the first group and of the second group board buses to travel to a museum, how many more people of the first group board buses than of the second group?

### Choices

Choice (4)Response
a.40
b.2
c.5
d.4

## Question 506

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### Question

MCQ▾

Aman’s mother was 21 years old when his sister was born. His father is 8 years older than his mother. Now Aman is 17 years old and his sister is 3 years older than him. What is the present age of Aman’s father?

### Choices

Choice (4)Response
a.50 years
b.46 years
c.49 years
d.47 years